JDK8 AIX javax/imageio/spi/AppletContextTest/BadPluginConfigurationTest.sh - Unrecognized system! AIX

Most recently https://trss.adoptium.net/output/test?id=616ff8ccc6182d02178e14ad

**Describe the bug**
Initially reported at https://github.com/eclipse/openj9/issues/12087

```
06:04:43 --------------------------------------------------
06:04:43 TEST: javax/imageio/spi/AppletContextTest/BadPluginConfigurationTest.sh
06:04:43 TEST JDK: /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdkbinary/j2sdk-image
06:04:43
06:04:43 ACTION: compile -- Passed. Compilation successful
06:04:43 REASON: User specified action: run compile IIOPluginTest.java
06:04:43 TIME: 1.358 seconds
06:04:43 messages:
06:04:43 command: compile /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test/javax/imageio/spi/AppletContextTest/IIOPluginTest.java
06:04:43 reason: User specified action: run compile IIOPluginTest.java
06:04:43 Mode: othervm
06:04:43 elapsed time (seconds): 1.358
06:04:43 configuration:
06:04:43 javac compilation environment
06:04:43 source path: /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test/javax/imageio/spi/AppletContextTest
06:04:43 class path: /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test/javax/imageio/spi/AppletContextTest
06:04:43 /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/TKG/output_16144120941027/jdk_imageio_0/work/classes/javax/imageio/spi/AppletContextTest
06:04:43 /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdkbinary/j2sdk-image/lib/tools.jar
06:04:43
06:04:43 rerun:
06:04:43 cd /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/TKG/output_16144120941027/jdk_imageio_0/work/javax/imageio/spi/AppletContextTest/BadPluginConfigurationTest && \
06:04:43 DISPLAY=:0 \
06:04:43 HOME=/home/jenkins \
06:04:43 LANG=en_US \
06:04:43 PATH=/bin:/usr/bin:/usr/sbin \
06:04:43 TZ=America/Toronto \
06:04:43 /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdkbinary/j2sdk-image/bin/javac \
06:04:43 -J-ea \
06:04:43 -J-esa \
06:04:43 -J-Xmx512m \
06:04:43 -J-XX:+UseCompressedOops \
06:04:43 -J-Dtest.vm.opts='-ea -esa -Xmx512m -XX:+UseCompressedOops' \
06:04:43 -J-Dtest.tool.vm.opts='-J-ea -J-esa -J-Xmx512m -J-XX:+UseCompressedOops' \
06:04:43 -J-Dtest.compiler.opts= \
06:04:43 -J-Dtest.java.opts= \
06:04:43 -J-Dtest.jdk=/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdkbinary/j2sdk-image \
06:04:43 -J-Dcompile.jdk=/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdkbinary/j2sdk-image \
06:04:43 -J-Dtest.timeout.factor=8.0 \
06:04:43 -J-Dtest.root=/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test \
06:04:43 -J-Dtest.name=javax/imageio/spi/AppletContextTest/BadPluginConfigurationTest.sh \
06:04:43 -J-Dtest.file=/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test/javax/imageio/spi/AppletContextTest/BadPluginConfigurationTest.sh \
06:04:43 -J-Dtest.src=/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test/javax/imageio/spi/AppletContextTest \
06:04:43 -J-Dtest.src.path=/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test/javax/imageio/spi/AppletContextTest \
06:04:43 -J-Dtest.classes=/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/TKG/output_16144120941027/jdk_imageio_0/work/classes/javax/imageio/spi/AppletContextTest \
06:04:43 -J-Dtest.class.path=/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/TKG/output_16144120941027/jdk_imageio_0/work/classes/javax/imageio/spi/AppletContextTest \
06:04:43 -d /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/TKG/output_16144120941027/jdk_imageio_0/work/classes/javax/imageio/spi/AppletContextTest \
06:04:43 -sourcepath /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test/javax/imageio/spi/AppletContextTest \
06:04:43 -classpath /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test/javax/imageio/spi/AppletContextTest:/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/TKG/output_16144120941027/jdk_imageio_0/work/classes/javax/imageio/spi/AppletContextTest:/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdkbinary/j2sdk-image/lib/tools.jar /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test/javax/imageio/spi/AppletContextTest/IIOPluginTest.java
06:04:43 STDOUT:
06:04:43 STDERR:
06:04:43
06:04:43 ACTION: compile -- Passed. Compilation successful
06:04:43 REASON: User specified action: run compile DummyReaderPluginSpi.java
06:04:43 TIME: 1.119 seconds
06:04:43 messages:
06:04:43 command: compile /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test/javax/imageio/spi/AppletContextTest/DummyReaderPluginSpi.java
06:04:43 reason: User specified action: run compile DummyReaderPluginSpi.java
06:04:43 Mode: othervm
06:04:43 elapsed time (seconds): 1.119
06:04:43 configuration:
06:04:43 javac compilation environment
06:04:43 source path: /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test/javax/imageio/spi/AppletContextTest
06:04:43 class path: /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test/javax/imageio/spi/AppletContextTest
06:04:43 /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/TKG/output_16144120941027/jdk_imageio_0/work/classes/javax/imageio/spi/AppletContextTest
06:04:43 /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdkbinary/j2sdk-image/lib/tools.jar
06:04:43
06:04:43 rerun:
06:04:43 cd /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/TKG/output_16144120941027/jdk_imageio_0/work/javax/imageio/spi/AppletContextTest/BadPluginConfigurationTest && \
06:04:43 DISPLAY=:0 \
06:04:43 HOME=/home/jenkins \
06:04:43 LANG=en_US \
06:04:43 PATH=/bin:/usr/bin:/usr/sbin \
06:04:43 TZ=America/Toronto \
06:04:43 /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdkbinary/j2sdk-image/bin/javac \
06:04:43 -J-ea \
06:04:43 -J-esa \
06:04:43 -J-Xmx512m \
06:04:43 -J-XX:+UseCompressedOops \
06:04:43 -J-Dtest.vm.opts='-ea -esa -Xmx512m -XX:+UseCompressedOops' \
06:04:43 -J-Dtest.tool.vm.opts='-J-ea -J-esa -J-Xmx512m -J-XX:+UseCompressedOops' \
06:04:43 -J-Dtest.compiler.opts= \
06:04:43 -J-Dtest.java.opts= \
06:04:43 -J-Dtest.jdk=/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdkbinary/j2sdk-image \
06:04:43 -J-Dcompile.jdk=/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdkbinary/j2sdk-image \
06:04:43 -J-Dtest.timeout.factor=8.0 \
06:04:43 -J-Dtest.root=/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test \
06:04:43 -J-Dtest.name=javax/imageio/spi/AppletContextTest/BadPluginConfigurationTest.sh \
06:04:43 -J-Dtest.file=/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test/javax/imageio/spi/AppletContextTest/BadPluginConfigurationTest.sh \
06:04:43 -J-Dtest.src=/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test/javax/imageio/spi/AppletContextTest \
06:04:43 -J-Dtest.src.path=/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test/javax/imageio/spi/AppletContextTest \
06:04:43 -J-Dtest.classes=/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/TKG/output_16144120941027/jdk_imageio_0/work/classes/javax/imageio/spi/AppletContextTest \
06:04:43 -J-Dtest.class.path=/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/TKG/output_16144120941027/jdk_imageio_0/work/classes/javax/imageio/spi/AppletContextTest \
06:04:43 -d /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/TKG/output_16144120941027/jdk_imageio_0/work/classes/javax/imageio/spi/AppletContextTest \
06:04:43 -sourcepath /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test/javax/imageio/spi/AppletContextTest \
06:04:43 -classpath /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test/javax/imageio/spi/AppletContextTest:/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/TKG/output_16144120941027/jdk_imageio_0/work/classes/javax/imageio/spi/AppletContextTest:/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdkbinary/j2sdk-image/lib/tools.jar /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test/javax/imageio/spi/AppletContextTest/DummyReaderPluginSpi.java
06:04:43 STDOUT:
06:04:43 STDERR:
06:04:43 Note: /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test/javax/imageio/spi/AppletContextTest/DummyReaderPluginSpi.java uses or overrides a deprecated API.
06:04:43 Note: Recompile with -Xlint:deprecation for details.
06:04:43
06:04:43 ACTION: shell -- Failed. Execution failed: exit code 1
06:04:43 REASON: User specified action: run shell BadPluginConfigurationTest.sh
06:04:43 TIME: 0.024 seconds
06:04:43 messages:
06:04:43 command: shell BadPluginConfigurationTest.sh
06:04:43 reason: User specified action: run shell BadPluginConfigurationTest.sh
06:04:43 elapsed time (seconds): 0.024
06:04:43 STDOUT:
06:04:43 Unrecognized system! AIX
06:04:43 The test failed :-(
06:04:43 exit status was 1
06:04:43 Removing PLUGINDST_DIR
06:04:43 STDERR:
06:04:43 Unrecognized system! AIX
06:04:43 rerun:
06:04:43 cd /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/TKG/output_16144120941027/jdk_imageio_0/work/javax/imageio/spi/AppletContextTest/BadPluginConfigurationTest && \
06:04:43 DISPLAY=:0 \
06:04:43 HOME=/home/jenkins \
06:04:43 LANG=en_US \
06:04:43 PATH=/bin:/usr/bin:/usr/sbin \
06:04:43 TZ=America/Toronto \
06:04:43 TESTFILE=/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test/javax/imageio/spi/AppletContextTest/BadPluginConfigurationTest.sh \
06:04:43 TESTSRC=/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test/javax/imageio/spi/AppletContextTest \
06:04:43 TESTSRCPATH=/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test/javax/imageio/spi/AppletContextTest \
06:04:43 TESTCLASSES=/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/TKG/output_16144120941027/jdk_imageio_0/work/classes/javax/imageio/spi/AppletContextTest \
06:04:43 TESTCLASSPATH=/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/TKG/output_16144120941027/jdk_imageio_0/work/classes/javax/imageio/spi/AppletContextTest \
06:04:43 COMPILEJAVA=/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdkbinary/j2sdk-image \
06:04:43 TESTJAVA=/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdkbinary/j2sdk-image \
06:04:43 TESTVMOPTS='-ea -esa -Xmx512m -XX:+UseCompressedOops' \
06:04:43 TESTTOOLVMOPTS='-J-ea -J-esa -J-Xmx512m -J-XX:+UseCompressedOops' \
06:04:43 TESTJAVACOPTS= \
06:04:43 TESTJAVAOPTS= \
06:04:43 TESTTIMEOUTFACTOR=8.0 \
06:04:43 TESTROOT=/home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test \
06:04:43 FS=/ \
06:04:43 PS=: \
06:04:43 NULL=/dev/null \
06:04:43 sh \
06:04:43 /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/openjdk/openjdk-jdk/jdk/test/javax/imageio/spi/AppletContextTest/BadPluginConfigurationTest.sh
06:04:43
06:04:43 TEST RESULT: Failed. Execution failed: exit code 1
06:04:43 --------------------------------------------------
06:06:48 Test results: passed: 141; failed: 1
06:06:54 Report written to /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/jvmtest/openjdk/report/html/report.html
06:06:54 Results written to /home/jenkins/workspace/Test_openjdk8_j9_extended.openjdk_ppc64_aix/openjdk-tests/TKG/output_16144120941027/jdk_imageio_0/work
06:06:54 Error: Some tests failed or other problems occurred.
06:06:54
06:06:54 jdk_imageio_0_FAILED
```

**To Reproduce**
Steps to reproduce the behavior (or Grinder rerun link):
rebuild the failed tests in one link:
06:11:58 https://hyc-runtimes-jenkins.swg-devops.com/job/Grinder/parambuild/?JDK_VERSION=8&JDK_IMPL=openj9&JDK_VENDOR=adoptopenjdk&BUILD_LIST=openjdk&PLATFORM=ppc64_aix_mixed&TARGET=testList%20TESTLIST=jdk_other_0,jdk_other_1,jdk_security4_0,jdk_security4_1,jdk_imageio_0,jdk_imageio_1

**Expected behavior**
Determine if this test can pass in `AIX` platform or has to be excluded.

https://github.com/eclipse/openj9/issues/12087#issuecomment-788216521
Noticed the same failure in hotspot: https://ci.adoptopenjdk.net/job/Test_openjdk8_hs_extended.openjdk_ppc64_aix/10/console
```
04:36:33.747 REASON: User specified action: run shell BadPluginConfigurationTest.sh
04:36:33.747 TIME: 0.022 seconds
04:36:33.747 messages:
04:36:33.747 command: shell BadPluginConfigurationTest.sh
04:36:33.747 reason: User specified action: run shell BadPluginConfigurationTest.sh
04:36:33.747 elapsed time (seconds): 0.022
04:36:33.747 STDOUT:
04:36:33.747 Unrecognized system! AIX
04:36:33.747 The test failed :-(
04:36:33.747 exit status was 1
04:36:33.747 Removing PLUGINDST_DIR
04:36:33.747 STDERR:
04:36:33.747 Unrecognized system! AIX
```

Start with jdk/test/javax/imageio/spi/AppletContextTest/BadPluginConfigurationTest.sh and inspect its platform handling, using the reported AIX failure and rerun command as context. Run the test on AIX after the change; done means it no longer reports “Unrecognized system! AIX” or exits with status 1.

Written by the indexing model from the issue text.