RFR: 8220: Make LocalJVMToolkit reflective

[Marcus Hirt]

Less painful from within Eclipse.

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Commit messages:
 - 8220: Make LocalJVMToolkit reflective

Changes: https://git.openjdk.org/jmc/pull/563/files
  Webrev: https://webrevs.openjdk.org/?repo=jmc&pr=563&range=00
  Issue: https://bugs.openjdk.org/browse/JMC-8220
  Stats: 373 lines in 4 files changed: 302 ins; 43 del; 28 mod
  Patch: https://git.openjdk.org/jmc/pull/563.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/563/head:pull/563

PR: https://git.openjdk.org/jmc/pull/563