[jdk18] RFR: 8132785: java/lang/management/ThreadMXBean/ThreadLists.java fails intermittently

[David Holmes]

Investigation showed this test was experiencing interference from threads created by other tests in agentvm mode. The simple solution is to run this test isolated using othervm mode. Also added some diagnostics to the test incase we see future failures.

Testing: local and tier3.

Thanks,
David

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Commit messages:
 - Fixed tab character
 - 8132785: java/lang/management/ThreadMXBean/ThreadLists.java fails intermittently

Changes: https://git.openjdk.java.net/jdk18/pull/14/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk18&pr=14&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8132785
  Stats: 23 lines in 2 files changed: 20 ins; 1 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk18/pull/14.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk18 pull/14/head:pull/14

PR: https://git.openjdk.java.net/jdk18/pull/14