[jdk11u-dev] RFR: 8210198: Clean up JNI_ENV_ARG for vmTestbase/jvmti/Get[A-F] tests

[Christoph Langer]

Backport of JDK-8210198: Clean up JNI_ENV_ARG for vmTestbase/jvmti/Get[A-F] tests.

A bunch of files don't exist in 11u. But for these which exist, changes apply cleanly.

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Commit messages:
 - Backport d256eb923bfdf82ffd2fa13a5cae3ba4893db050

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/347/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=347&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8210198
  Stats: 44 lines in 11 files changed: 0 ins; 44 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/347.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/347/head:pull/347

PR: https://git.openjdk.java.net/jdk11u-dev/pull/347