[jdk8u-dev] RFR: 8264524: jdk/internal/platform/docker/TestDockerMemoryMetrics.java fails due to swapping not working

[SendaoYan]

Hi all,

This backport PR partial fix the test bug, which may cause test fails without swapping memory. Change has been verified locally. Test-fix only, no risk. This backport will make later backport JDK-8343340 cleanly.

Only the different copyright year cause this backport uncleanly. Other parts are backport cleanly.

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Commit messages:
 - Backport bfb034abf9d5e5eb24d524f35b3f745e94631c4a

Changes: https://git.openjdk.org/jdk8u-dev/pull/708/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=708&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8264524
  Stats: 25 lines in 1 file changed: 23 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/708.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/708/head:pull/708

PR: https://git.openjdk.org/jdk8u-dev/pull/708