RFR(s): 8240189: [TESTBUG] Some cgroup tests are failing after JDK-8231111

[Severin Gehwolf]

Hi,

Could somebody please review those test fixes for the Metrics platform
tests? Some code paths are apparently not being executed on "common"
platforms which didn't make those issues show up earlier :-/ I've
missed to update some hard-coded values to account for changes done via
JDK-8231111. Matthias Baesken from SAP was kind enough to run this
through their testing and no more issues show up after this. Much
appreciated, Matthias!

Bug: https://bugs.openjdk.java.net/browse/JDK-8240189
webrev: http://cr.openjdk.java.net/~sgehwolf/webrevs/JDK-8240189/01/webrev/

Testing: Docker tests on Linux x86_64 cgroups v1 and Linux cgroups v2
(no change). Additional testing done by SAP. All seems to look good.

Thoughts?

Thanks,
Severin