RFR: Complete some todos in VMOptions

Mon Jun 20 02:15:39 UTC 2022

Complete some todos in VMOptions

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Commit messages:
 - Merge branch 'SteafanMrZhouJOLBranch' of https://urldefense.com/v3/__https://github.com/SteafanMrZhou/jol__;!!ACWV5N9M2RV99hQ!N07BEZ5rgTOsYZABoQrUDmT6ODiTARTHFcdT-NULUtdcJmxkJEKfCK9pJWdUC6_bBF1rVR-xu0mfCEid$  into SteafanMrZhouJOLBranch
 - revert GraphInstanceBench 49 line.
 - some code clean.
 - complete some todos in VMOptions.

Changes: https://git.openjdk.org/jol/pull/27/files
 Webrev: https://webrevs.openjdk.org/?repo=jol&pr=27&range=00
  Stats: 260 lines in 21 files changed: 151 ins; 0 del; 109 mod
  Patch: https://git.openjdk.org/jol/pull/27.diff
  Fetch: git fetch https://git.openjdk.org/jol pull/27/head:pull/27

PR: https://git.openjdk.org/jol/pull/27