Flaky-test: PulsarFunctionsJavaProcessTest.testJavaExclamationFunction

[example failure](https://github.com/apache/pulsar/runs/7509406611?check_suite_focus=true)

```
Error: Tests run: 61, Failures: 24, Errors: 0, Skipped: 30, Time elapsed: 911.383 s <<< FAILURE! - in TestSuite
Error: testJavaExclamationFunction(org.apache.pulsar.tests.integration.functions.java.PulsarFunctionsJavaProcessTest) Time elapsed: 65.781 s <<< FAILURE!
org.awaitility.core.ConditionTimeoutException: Assertion condition defined as a org.apache.pulsar.tests.integration.functions.PulsarFunctionsTest null within 15 seconds.
at org.awaitility.core.ConditionAwaiter.await(ConditionAwaiter.java:167)
at org.awaitility.core.AssertionCondition.await(AssertionCondition.java:119)
at org.awaitility.core.AssertionCondition.await(AssertionCondition.java:31)
at org.awaitility.core.ConditionFactory.until(ConditionFactory.java:985)
at org.awaitility.core.ConditionFactory.untilAsserted(ConditionFactory.java:769)
at org.apache.pulsar.tests.integration.functions.PulsarFunctionsTest.getFunctionStatus(PulsarFunctionsTest.java:1095)
at org.apache.pulsar.tests.integration.functions.PulsarFunctionsTest.testExclamationFunction(PulsarFunctionsTest.java:727)
at org.apache.pulsar.tests.integration.functions.java.PulsarFunctionsJavaTest.testJavaExclamationFunction(PulsarFunctionsJavaTest.java:101)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:132)
at org.testng.internal.InvokeMethodRunnable.runOne(InvokeMethodRunnable.java:45)
at org.testng.internal.InvokeMethodRunnable.call(InvokeMethodRunnable.java:73)
at org.testng.internal.InvokeMethodRunnable.call(InvokeMethodRunnable.java:11)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: java.util.concurrent.TimeoutException
at java.base/java.util.concurrent.FutureTask.get(FutureTask.java:204)
at org.awaitility.core.Uninterruptibles.getUninterruptibly(Uninterruptibles.java:101)
at org.awaitility.core.Uninterruptibles.getUninterruptibly(Uninterruptibles.java:81)
at org.awaitility.core.ConditionAwaiter.await(ConditionAwaiter.java:103)
... 19 more
```

Start by running PulsarFunctionsJavaProcessTest.testJavaExclamationFunction and read the stack path through PulsarFunctionsJavaTest.testJavaExclamationFunction, PulsarFunctionsTest.testExclamationFunction, and getFunctionStatus. Investigate why the function status does not become available within 15 seconds; done means the test completes reliably without the Awaitility timeout.

Written by the indexing model from the issue text.