[jdk17u-dev] RFR: 8319456: jdk/jfr/event/gc/collection/TestGCCauseWith[Serial|Parallel].java : GC cause 'GCLocker Initiated GC' not in the valid causes

[Goetz Lindenmaier]

I backport this for parity with 17.0.11-oracle.

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Commit messages:
 - Backport 7c7f8ea30da7fe552bcd4f2b593fa9aad27dcdb4

Changes: https://git.openjdk.org/jdk17u-dev/pull/2073/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2073&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8319456
  Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2073.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2073/head:pull/2073

PR: https://git.openjdk.org/jdk17u-dev/pull/2073