[jdk17u-dev] RFR: 8281379: Assign package declarations to all jtreg test cases under gc

[Goetz Lindenmaier]

Resolved test/hotspot/jtreg/gc/g1/numa/TestG1NUMATouchRegions.java
and test/hotspot/jtreg/gc/z/TestGarbageCollectorMXBean.java.

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Commit messages:
 - Backport c820d1acb7c6e600a890e4205eef0be8a4c7a791

Changes: https://git.openjdk.org/jdk17u-dev/pull/2932/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2932&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8281379
  Stats: 18 lines in 5 files changed: 8 ins; 0 del; 10 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2932.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2932/head:pull/2932

PR: https://git.openjdk.org/jdk17u-dev/pull/2932