[jdk11u-dev] RFR: 8276177: nsk/jvmti/RedefineClasses/StressRedefineWithoutBytecodeCorruption failed with "assert(def_ik->is_being_redefined()) failed: should be being redefined to get here"

[Zhengyu Gu]

I would like to backport this patch for parity with Oracle 11.0.15.

The original patch does not apply cleanly, due to context differences. The patch is small and straightforward, can be handled manually.

Test:
- [x] Affected test failed w/o patch and passed with patch.

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

Commit messages:
- cleanup
- Merge branch 'master' into backport-8276177-redefine
- Backport a907b2b144f2af27392eb7c2f9656fbb1a759618

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/693/files
Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=693&range=00
Issue: https://bugs.openjdk.java.net/browse/JDK-8276177
Stats: 17 lines in 2 files changed: 14 ins; 0 del; 3 mod
Patch: https://git.openjdk.java.net/jdk11u-dev/pull/693.diff
Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/693/head:pull/693

PR: https://git.openjdk.java.net/jdk11u-dev/pull/693