RFR: CODETOOLS-7902861: jcstress: Optimize and clean up result handling

Tue Mar 23 10:40:59 UTC 2021

After VM output capture was enabled, the results file became exceedingly large. It is mostly due to recording the Whitebox messages. But, we can also cleanup the whole thing.

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Commit messages:
 - Optimize and clean up result handling

Changes: https://git.openjdk.java.net/jcstress/pull/18/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jcstress&pr=18&range=00
  Issue: https://bugs.openjdk.java.net/browse/CODETOOLS-7902861
  Stats: 85 lines in 6 files changed: 54 ins; 15 del; 16 mod
  Patch: https://git.openjdk.java.net/jcstress/pull/18.diff
  Fetch: git fetch https://git.openjdk.java.net/jcstress pull/18/head:pull/18

PR: https://git.openjdk.java.net/jcstress/pull/18