[jdk8u-dev] RFR: 8293540: [Metrics] Incorrectly detected resource limits with additional cgroup fs mounts [v2]

[Jonathan Dowland]

> This is a backport of 8293540 to jdk8u-dev for cgroups v2 support.
> 
> Unclean: new test (TestDockerBasic.java) needed adjustments for the 8u test library paths and available methods.

Jonathan Dowland has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase.

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Changes:
  - all: https://git.openjdk.org/jdk8u-dev/pull/221/files
  - new: https://git.openjdk.org/jdk8u-dev/pull/221/files/2bc0fa3b..2bc0fa3b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=221&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=221&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/221.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev pull/221/head:pull/221

PR: https://git.openjdk.org/jdk8u-dev/pull/221