[11u] RFR: 8236617: jtreg test containers/docker/TestMemoryAwareness.java fails after 8226575

[Severin Gehwolf]

Hi,

Please review this follow-up fix for JDK-8226575 (Container aware
OperatingSystemMXBean) which is pending review for a 11u backport. It
fixes a test issue seen on SAP's test cluster. The JDK 15 patch didn't
apply cleanly since the backport doesn't add new method names and
CheckOperatingSystemMXBean diagnostics don't print them. I've adjusted
it manually.

Bug: https://bugs.openjdk.java.net/browse/JDK-8236617
webrev: http://cr.openjdk.java.net/~sgehwolf/webrevs/JDK-8236617/jdk11/01/webrev/
original change: https://hg.openjdk.java.net/jdk/jdk/rev/ab10165b4141

Testing: Docker tests on Linux x86_64. Passed.

Once reviewed and approved I intend to push JDK-8226575 and
JDK-8236617 together.

Thanks,
Severin