git: openjdk/jdk8u-dev: 8253939: [TESTBUG] Increase coverage of the cgroups detection code

[Jonathan Dowland]

Changeset: 4dfc7421
Author:    Jonathan Dowland <jdowland at openjdk.org>
Date:      2022-12-15 18:01:19 +0000
URL:       https://git.openjdk.org/jdk8u-dev/commit/4dfc7421e8b934f503837659396e21cb4e29e694

8253939: [TESTBUG] Increase coverage of the cgroups detection code

Reviewed-by: sgehwolf
Backport-of: 42fc15899115ca61151bbee96b5580d4e4252beb

! hotspot/test/runtime/containers/cgroup/CgroupSubsystemFactory.java
! jdk/test/jdk/internal/platform/cgroup/TestCgroupSubsystemFactory.java