MulticastSocket tests failed on aix with jdk 15 and 16

**Describe the bug**
Several MulticastSocket test failed on aix with jdk 15 and 16 for both hotspot and openj9. These tests are:
- java/net/MulticastSocket/Test.java
- java/net/MulticastSocket/Promiscuous.java
- java/net/MulticastSocket/B6427403.java
- java/net/MulticastSocket/NoLoopbackPackets.java
- java/net/MulticastSocket/SetLoopbackMode.java

**To Reproduce**
Steps to reproduce the behavior (or Grinder rerun link):
https://ci.adoptopenjdk.net/view/Test_grinder/job/Grinder/6464/testReport/
https://ci.adoptopenjdk.net/view/Test_grinder/job/Grinder/6463/testReport/
https://ci.adoptopenjdk.net/view/Test_grinder/job/Grinder/6522/testReport/

**Additional context**

java/net/MulticastSocket/Test.java
```
java.net.SocketException: joinGroup failed
at java.base/sun.nio.ch.DatagramSocketAdaptor.joinGroup(DatagramSocketAdaptor.java:482)
at java.base/java.net.MulticastSocket.joinGroup(MulticastSocket.java:329)
at Test.doTest(Test.java:71)
at Test.allTests(Test.java:141)
at Test.main(Test.java:167)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:298)
at java.base/java.lang.Thread.run(Thread.java:832)
Caused by: java.lang.IllegalArgumentException: IPv6 socket cannot join IPv4 multicast group
at java.base/sun.nio.ch.DatagramChannelImpl.innerJoin(DatagramChannelImpl.java:1466)
at java.base/sun.nio.ch.DatagramChannelImpl.join(DatagramChannelImpl.java:1551)
at java.base/sun.nio.ch.DatagramSocketAdaptor.joinGroup(DatagramSocketAdaptor.java:532)
at java.base/sun.nio.ch.DatagramSocketAdaptor.joinGroup(DatagramSocketAdaptor.java:479)
... 10 more
java.lang.Exception: Test failed - see log file for details
at Test.main(Test.java:179)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:298)
at java.base/java.lang.Thread.run(Thread.java:832)

JavaTest Message: Test threw exception: java.lang.Exception
```

java/net/MulticastSocket/Promiscuous.java
```
java.lang.RuntimeException: 0.0.0.0/0.0.0.0:36590: Expected message not received, Receive timed out
at Promiscuous.receive(Promiscuous.java:79)
at Promiscuous.test(Promiscuous.java:140)
at Promiscuous.main(Promiscuous.java:195)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:832)

JavaTest Message: Test threw exception: java.lang.RuntimeException: 0.0.0.0/0.0.0.0:36590: Expected message not received, Receive timed out
```

java/net/MulticastSocket/B6427403.java
```
java.net.SocketException: joinGroup failed
at java.base/sun.nio.ch.DatagramSocketAdaptor.joinGroup(DatagramSocketAdaptor.java:482)
at java.base/java.net.MulticastSocket.joinGroup(MulticastSocket.java:329)
at B6427403.main(B6427403.java:38)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:298)
at java.base/java.lang.Thread.run(Thread.java:832)
Caused by: java.lang.IllegalArgumentException: IPv6 socket cannot join IPv4 multicast group
at java.base/sun.nio.ch.DatagramChannelImpl.innerJoin(DatagramChannelImpl.java:1466)
at java.base/sun.nio.ch.DatagramChannelImpl.join(DatagramChannelImpl.java:1551)
at java.base/sun.nio.ch.DatagramSocketAdaptor.joinGroup(DatagramSocketAdaptor.java:532)
at java.base/sun.nio.ch.DatagramSocketAdaptor.joinGroup(DatagramSocketAdaptor.java:479)
... 8 more

JavaTest Message: Test threw exception: java.net.SocketException
JavaTest Message: shutting down test
```

java/net/MulticastSocket/NoLoopbackPackets.java
```
java.lang.IllegalArgumentException: IPv6 socket cannot join IPv4 multicast group
at java.base/sun.nio.ch.DatagramChannelImpl.innerJoin(DatagramChannelImpl.java:1466)
at java.base/sun.nio.ch.DatagramChannelImpl.join(DatagramChannelImpl.java:1551)
at java.base/sun.nio.ch.DatagramSocketAdaptor.joinGroup(DatagramSocketAdaptor.java:532)
at java.base/java.net.MulticastSocket.joinGroup(MulticastSocket.java:384)
at NoLoopbackPackets.main(NoLoopbackPackets.java:94)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:298)
at java.base/java.lang.Thread.run(Thread.java:832)

JavaTest Message: Test threw exception: java.lang.IllegalArgumentException
```

java/net/MulticastSocket/SetLoopbackMode.java
```
java.net.SocketException: joinGroup failed
at java.base/sun.nio.ch.DatagramSocketAdaptor.joinGroup(DatagramSocketAdaptor.java:482)
at java.base/java.net.MulticastSocket.joinGroup(MulticastSocket.java:329)
at SetLoopbackMode.main(SetLoopbackMode.java:132)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:832)
Caused by: java.lang.IllegalArgumentException: IPv6 socket cannot join IPv4 multicast group
at java.base/sun.nio.ch.DatagramChannelImpl.innerJoin(DatagramChannelImpl.java:1466)
at java.base/sun.nio.ch.DatagramChannelImpl.join(DatagramChannelImpl.java:1551)
at java.base/sun.nio.ch.DatagramSocketAdaptor.joinGroup(DatagramSocketAdaptor.java:532)
at java.base/sun.nio.ch.DatagramSocketAdaptor.joinGroup(DatagramSocketAdaptor.java:479)
... 8 more

JavaTest Message: Test threw exception: java.net.SocketException: joinGroup failed
```

Start with the five failing tests under java/net/MulticastSocket and rerun the AIX Grinder reports 6463, 6464, and 6522. Compare the joinGroup and receive-timeout failures on JDK 15 and 16 across HotSpot and OpenJ9; done means these tests pass in the affected AIX configurations.

Written by the indexing model from the issue text.