[jdk17u-dev] RFR: 8258734: jdk/jfr/event/oldobject/TestClassLoaderLeak.java failed with "RuntimeException: Could not find class leak"

[Goetz Lindenmaier]

I backport this for parity with 17.0.13-oracle.

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Commit messages:
 - Backport aefd4ac4a336f00c067bcb91b95472ccc9a6bf83

Changes: https://git.openjdk.org/jdk17u-dev/pull/3043/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3043&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8258734
  Stats: 7 lines in 1 file changed: 4 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3043.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3043/head:pull/3043

PR: https://git.openjdk.org/jdk17u-dev/pull/3043