[jdk17u-dev] RFR: 8297740: runtime/ClassUnload/UnloadTest.java failed with "Test failed: should still be live"

[Goetz Lindenmaier]

I backport this for parity with 17.0.17-oracle.

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Depends on: https://git.openjdk.org/jdk17u-dev/pull/3701

Commit messages:
 - Backport a97e7d9887e448c88f59cf70bfb8ab72435ece9c

Changes: https://git.openjdk.org/jdk17u-dev/pull/3702/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3702&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8297740
  Stats: 5 lines in 1 file changed: 2 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3702.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3702/head:pull/3702

PR: https://git.openjdk.org/jdk17u-dev/pull/3702