[jdk17u-dev] RFR: 8293472: Incorrect container resource limit detection if manual cgroup fs mounts present

[Severin Gehwolf]

Clean backport. Fixes some issues with logs showing up on some systems confusing tooling.

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Commit messages:
 - Backport 8f3bbe950fb5a3d9f6cae122209df01df0f342f0

Changes: https://git.openjdk.org/jdk17u-dev/pull/783/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=783&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293472
  Stats: 162 lines in 6 files changed: 108 ins; 27 del; 27 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/783.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/783/head:pull/783

PR: https://git.openjdk.org/jdk17u-dev/pull/783