RFR: 8313256: Exclude Multicast tests on AIX

[Thomas Obermeier]

exclude multicast and related tests on AIX mentioned in https://bugs.openjdk.org/browse/JDK-8308807 until this is fixed.

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Commit messages:
 - Merge branch 'master' into patch-1
 - Update ProblemList.txt exclude MulticastSocket tests for AIX
 - Update ProblemList.txt exclude java/foreign/TestByteBuffer

Changes: https://git.openjdk.org/jdk/pull/15074/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15074&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8313256
  Stats: 13 lines in 1 file changed: 5 ins; 0 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/15074.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15074/head:pull/15074

PR: https://git.openjdk.org/jdk/pull/15074