[lworld] RFR: 8366820: [lworld] TestClassLoaderStatsEvent.java test failure

[Coleen Phillimore]

This change excludes all but ObjArrayKlass in class listing, since the caller cares about Java types, not Metadata.  JFR calls this code.  This uses similar code and comment to JVMTI changes.

Tested with tier1-4.

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Commit messages:
 - Update test/jdk/ProblemList.txt
 - Update test/jdk/ProblemList.txt
 - Merge branch 'lworld' into jfr
 - 8366820: [lworld] TestClassLoaderStatsEvent.java test failure

Changes: https://git.openjdk.org/valhalla/pull/2054/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=2054&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8366820
  Stats: 17 lines in 2 files changed: 13 ins; 2 del; 2 mod
  Patch: https://git.openjdk.org/valhalla/pull/2054.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/2054/head:pull/2054

PR: https://git.openjdk.org/valhalla/pull/2054