[jdk17u-dev] RFR: 8313256: Exclude failing multicast tests on AIX

[Amos Shi]

Backport of [JDK-8313256](https://bugs.openjdk.org/browse/JDK-8313256)
- This PR contains two commit
- `commit 1` is generated by git apply command, which is `clean`
- `commit 2` is the manual merge of the `test/jdk/ProblemList.txt.rej` file

Contents of `test/jdk/ProblemList.txt.rej`


@@ -586,13 +587,16 @@
 
 # jdk_net
 
-java/net/MulticastSocket/NoLoopbackPackets.java                 7122846 macosx-all
-java/net/MulticastSocket/SetLoopbackMode.java                   7122846 macosx-all
+java/net/MulticastSocket/NoLoopbackPackets.java                 7122846,8308807 macosx-all,aix-ppc64
+java/net/MulticastSocket/SetLoopbackMode.java                   7122846,8308807 macosx-all,aix-ppc64
 
-java/net/MulticastSocket/Test.java                              7145658 macosx-all
+java/net/MulticastSocket/Test.java                              7145658,8308807 macosx-all,aix-ppc64
 
 java/net/ServerSocket/AcceptInheritHandle.java                  8211854 aix-ppc64
 
+java/net/MulticastSocket/B6427403.java                          8308807 aix-ppc64
+java/net/MulticastSocket/SetOutgoingIf.java                     8308807 aix-ppc64
+
 ############################################################################
 
 # jdk_nio


Testing
- Local: Not applicable. we don't have AIX system in local dev machine unfortunately.
- Pipeline: 
- Testing Machine:

-------------

Commit messages:
 - Backport 98a915a54ce62da7cebc1f0ab07dab276291a1d1 Manual merge ProblemList.txt
 - Backport 98a915a54ce62da7cebc1f0ab07dab276291a1d1

Changes: https://git.openjdk.org/jdk17u-dev/pull/2780/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2780&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8313256
  Stats: 12 lines in 1 file changed: 6 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2780.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2780/head:pull/2780

PR: https://git.openjdk.org/jdk17u-dev/pull/2780