RFR: 7903889: jcstress: document used properites (and env variables)

[Jiří Vaněk]

The verbose help can be removed, the individual properties with defaults can be wrapped to its class. Even the OptionSpec and OptionFormatter can be used if needed

No Env. vars were found

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Commit messages:
 - 7903889: jcstress: document used properites (and env variables)

Changes: https://git.openjdk.org/jcstress/pull/156/files
  Webrev: https://webrevs.openjdk.org/?repo=jcstress&pr=156&range=00
  Issue: https://bugs.openjdk.org/browse/CODETOOLS-7903889
  Stats: 240 lines in 7 files changed: 180 ins; 26 del; 34 mod
  Patch: https://git.openjdk.org/jcstress/pull/156.diff
  Fetch: git fetch https://git.openjdk.org/jcstress.git pull/156/head:pull/156

PR: https://git.openjdk.org/jcstress/pull/156