[jdk25u-dev] RFR: 8370966: Create regression test for the hierarchical memory limit fix in JDK-8370572

[Severin Gehwolf]

Clean backport of the test for #76

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Depends on: https://git.openjdk.org/jdk25u-dev/pull/76

Commit messages:
 - Backport 291003208c025ce4f9a94ba6093e207d0792bbb9

Changes: https://git.openjdk.org/jdk25u-dev/pull/77/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk25u-dev&pr=77&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8370966
  Stats: 191 lines in 8 files changed: 154 ins; 32 del; 5 mod
  Patch: https://git.openjdk.org/jdk25u-dev/pull/77.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u-dev.git pull/77/head:pull/77

PR: https://git.openjdk.org/jdk25u-dev/pull/77