RFR: 8339587: runtime/reflect/ReflectOutOfMemoryError.java fails with "bootstrap method initialization exception"

[David Holmes]

Please review this simple test fix. The test provokes OOME but it was sometimes getting encountered in a context that led to a secondary exception - like the "bootstrap method initialization exception". The fix is to check the chain of exceptions to see if OOME was the cause.

Testing:
 - test itself 5x on each platform
 - manual testing with use of ParallelGC and disabling compressed oops as per the bug report.

Thanks.

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Commit messages:
 - 8339587: runtime/reflect/ReflectOutOfMemoryError.java fails with "bootstrap method initialization exception"

Changes: https://git.openjdk.org/jdk/pull/20881/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20881&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8339587
  Stats: 16 lines in 1 file changed: 9 ins; 0 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/20881.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20881/head:pull/20881

PR: https://git.openjdk.org/jdk/pull/20881