RFR: dcubed - cleanup2 changes (JVM/TI, JDI, JDWP)

[Daniel D.Daugherty]

Trivial cleanup changes to JVM/TI, JDI and JDWP.

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Commit messages:
 - dcubed - cleanup2 changes (JVM/TI, JDI, JDWP)

Changes: https://git.openjdk.java.net/loom/pull/153/files
 Webrev: https://webrevs.openjdk.java.net/?repo=loom&pr=153&range=00
  Stats: 18 lines in 12 files changed: 1 ins; 1 del; 16 mod
  Patch: https://git.openjdk.java.net/loom/pull/153.diff
  Fetch: git fetch https://git.openjdk.java.net/loom pull/153/head:pull/153

PR: https://git.openjdk.java.net/loom/pull/153