git: openjdk/jdk19u: master: 8284977: MetricsTesterCgroupV2.getLongValueEntryFromFile fails when named value doesn't exist

[Christoph Langer]

Changeset: d10e902a
Author:    Christoph Langer <clanger at openjdk.org>
Date:      2022-08-26 08:06:37 +0000
URL:       https://git.openjdk.org/jdk19u/commit/d10e902ad899a2908acc0f196b720768160644ff

8284977: MetricsTesterCgroupV2.getLongValueEntryFromFile fails when named value doesn't exist

Backport-of: 444a0d98ac06ab043e3b11281234fd515abff302

! test/lib/jdk/test/lib/containers/cgroup/MetricsTesterCgroupV2.java