RFR: 8308341: JNI_GetCreatedJavaVMs returns a partially initialized JVM [v2]

[David Holmes]

> We now track the in-progress and completed states of VM creation and only return a VM from JNI_GetCreatedJavaVMs when there is a fully initialized VM.
> 
> Testing: 
>  - new regression test
>  - tiers 1-3 (sanity)
> 
> Thanks

David Holmes has updated the pull request incrementally with one additional commit since the last revision:

  Enable the test on all Posix platforms

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/14139/files
  - new: https://git.openjdk.org/jdk/pull/14139/files/8f6aa1f7..2bf95d8c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14139&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14139&range=00-01

  Stats: 6 lines in 2 files changed: 1 ins; 2 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/14139.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14139/head:pull/14139

PR: https://git.openjdk.org/jdk/pull/14139