RFR: 8374364: TestCgroupMetrics.java fails when cpuset unmounted [v3]

[SendaoYan]

> Hi all,
> 
> Test jdk/internal/platform/cgroup/TestCgroupMetrics.java report fails when the docker service is unavailable. The details shows in jbs issue. I think it's better to call `DockerTestUtils.checkCanTestDocker()` before run this test.
> 
> Change has been verified locally. Test-fix only, no risk.

SendaoYan has updated the pull request incrementally with one additional commit since the last revision:

  Check cpu period and cpuset avaialable before test

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/28996/files
  - new: https://git.openjdk.org/jdk/pull/28996/files/fe094b55..1be8d17a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28996&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28996&range=01-02

  Stats: 12 lines in 2 files changed: 7 ins; 2 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/28996.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28996/head:pull/28996

PR: https://git.openjdk.org/jdk/pull/28996