[jdk8u-dev] RFR: 8262379: Add regression test for JDK-8257746

[Jonathan Dowland]

This is a backport of 8262379: Add regression test for JDK-8257746 for jdk8u-dev as part of cgroups v2 support.

-------------

Depends on: https://git.openjdk.org/jdk8u-dev/pull/170

Commit messages:
 - 8262379: Add regression test for JDK-8257746

Changes: https://git.openjdk.org/jdk8u-dev/pull/171/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=171&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8262379
  Stats: 55 lines in 1 file changed: 55 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/171.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev pull/171/head:pull/171

PR: https://git.openjdk.org/jdk8u-dev/pull/171