cmdLineTester_getPid_0 is failing on at least zlinux Ubuntu 18

[pshipton]

See #11786 (comment) and the following comments.

Last night:
OpenJ9: d132a6b
OMR: b38b0b7
OpenJDK11: b608a89

Later build:
19:22:51 OpenJ9 - fb8c08c
19:22:51 OMR - 5ad82738f7e
19:22:51 JCL - f7475ea97ee based on jdk-11.0.10+9)

d132a6b...fb8c08c
eclipse-openj9/openj9-omr@b38b0b7...5ad8273
ibmruntimes/openj9-openjdk-jdk11@b608a89...f7475ea

[gacholio]

The getPid call comes down to ProcessHandle.current().pid()

[pshipton]

triage1 without #11761 - https://ci.eclipse.org/openj9/job/Pipeline-Build-Test-Personal/17 - https://ci.eclipse.org/openj9/view/Test/job/Grinder/1467 - failed 056cf6b92c3

triage2 without #11755 - https://ci.eclipse.org/openj9/job/Pipeline-Build-Test-Personal/18 - https://ci.eclipse.org/openj9/view/Test/job/Grinder/1468 - failed 8e3268b0450

triage3 without #11779 - https://ci.eclipse.org/openj9/job/Pipeline-Build-Test-Personal/19 - https://ci.eclipse.org/openj9/view/Test/job/Grinder/1469 - failed 0065715d07c

triage4 without #11735 #11789 #11682 #11784 - https://ci.eclipse.org/openj9/job/Pipeline-Build-Test-Personal/20 - https://ci.eclipse.org/openj9/view/Test/job/Grinder/1470 - failed f93331a

traige5 without #11682 #11784 - https://ci.eclipse.org/openj9/job/Pipeline-Build-Test-Personal/23

triage6 without #11784 - https://ci.eclipse.org/openj9/job/Pipeline-Build-Test-Personal/24

triage7 without #11773 and later - https://ci.eclipse.org/openj9/job/Pipeline-Build-Test-Personal/26 -

[pshipton]

Retested the previous night's build, this time it failed 2/10.
https://ci.eclipse.org/openj9/job/Grinder/1471

[pshipton]

Trying a 0.24 build https://ci.eclipse.org/openj9/job/Grinder/1474

[pshipton]

It's failing on the 0.24 build. I suspect a machine problem, which may be related to #11798