[jdk17u-dev] RFR: 8282642: vmTestbase/gc/gctests/LoadUnloadGC2/LoadUnloadGC2.java fails intermittently with exit code 1

Fri Sep 30 19:03:29 UTC 2022

Backport for [JDK-8282642](https://bugs.openjdk.org/browse/JDK-8282642) vmTestbase/gc/gctests/LoadUnloadGC2/LoadUnloadGC2.java fails intermittently with exit code 1

Clean backport, test only. Low risk.

How it was tested: 
* ran jtreg tiers to make sure fix does not break anything
* ran vmTestbase/gc/gctests/LoadUnloadGC2/LoadUnloadGC2.java with specified params over night

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Commit messages:
 - Backport 7db5abddd126db388b1a7f89be258e8aa7104da7

Changes: https://git.openjdk.org/jdk17u-dev/pull/762/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=762&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8282642
  Stats: 18 lines in 1 file changed: 12 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/762.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/762/head:pull/762

PR: https://git.openjdk.org/jdk17u-dev/pull/762