RFR: 8350709: [JMH] test ProtectionDomainBench failed for 2 threads config

[Mark Powers]

[JDK-8350709](https://bugs.openjdk.org/browse/JDK-8350709)

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Commit messages:
 - second iteration
 - first iteration

Changes: https://git.openjdk.org/jdk/pull/26301/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26301&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8350709
  Stats: 66 lines in 1 file changed: 19 ins; 11 del; 36 mod
  Patch: https://git.openjdk.org/jdk/pull/26301.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26301/head:pull/26301

PR: https://git.openjdk.org/jdk/pull/26301