RFR: 8352926: New test TestDockerMemoryMetricsSubgroup.java fails

[PAWAN CHAWDHARY]

8352926: New test TestDockerMemoryMetricsSubgroup.java fails

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Commit messages:
 - update comment
 - 8352926: New test TestDockerMemoryMetricsSubgroup.java fails

Changes: https://git.openjdk.org/jdk/pull/24948/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24948&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8352926
  Stats: 157 lines in 2 files changed: 157 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/24948.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24948/head:pull/24948

PR: https://git.openjdk.org/jdk/pull/24948