RFR: 8269530: runtime/ParallelLoad/ParallelSuperTest.java timeout

[Patricio Chilano Mateo]

Hi,

Please review this small fix to test ParallelSuperTest.java. I only saw the timeout once on one of my GHA tests but the issue can be easily reproduced by adding a delay in startLoading() before the main thread tries to synchronize on thread_sync.
Run the test with and without the added delay. The test times out without the patch and passes with the patch.

Thanks,
Patricio

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Commit messages:
 - v1

Changes: https://git.openjdk.java.net/jdk/pull/4614/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4614&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8269530
  Stats: 22 lines in 2 files changed: 4 ins; 4 del; 14 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4614.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4614/head:pull/4614

PR: https://git.openjdk.java.net/jdk/pull/4614