RFR: 8264524: jdk/internal/platform/docker/TestDockerMemoryMetrics.java fails due to OOM killed

[Jie Fu]

Hi all,

jdk/internal/platform/docker/TestDockerMemoryMetrics.java fails on some of our testing platforms.
This is because testMemoryFailCount [1] fails due to OOM killed.
This test fails to avoid OOM killed [2] if memory.failcnt is always 0.

The fix will print "Not OOM killed" if OOM killed doesn't happen.
And also fix another bug if the test get returned here [3].

Testing: 
  - jdk/internal/platform/docker/ hotspot/jtreg/containers on Linux/x64

Thanks.
Best regards,
Jie

[1] https://github.com/openjdk/jdk/blob/master/test/jdk/jdk/internal/platform/docker/TestDockerMemoryMetrics.java#L80
[2] https://github.com/openjdk/jdk/blob/master/test/jdk/jdk/internal/platform/docker/MetricsMemoryTester.java#L87
[3] https://github.com/openjdk/jdk/blob/master/test/jdk/jdk/internal/platform/docker/MetricsMemoryTester.java#L96

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Commit messages:
 - 8264524: jdk/internal/platform/docker/TestDockerMemoryMetrics.java fails due to OOM killed

Changes: https://git.openjdk.java.net/jdk/pull/3286/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3286&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8264524
  Stats: 14 lines in 2 files changed: 11 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3286.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3286/head:pull/3286

PR: https://git.openjdk.java.net/jdk/pull/3286