RFR: JDK-8293472: Cgroup: 'stomping of _mount_path' crash if manually mounted cpusets exist

Wed Sep 7 08:45:13 UTC 2022

Similar to [JDK-8253435](https://bugs.openjdk.org/browse/JDK-8253435), when setting the mount path of cgroup controller "memory/cpu/cpuacct/pids", it should also discard duplicate items.

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Commit messages:
 - Fix crash of duplicate cg controller mountpoint

Changes: https://git.openjdk.org/jdk/pull/10193/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10193&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293472
  Stats: 89 lines in 3 files changed: 61 ins; 18 del; 10 mod
  Patch: https://git.openjdk.org/jdk/pull/10193.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10193/head:pull/10193

PR: https://git.openjdk.org/jdk/pull/10193