git: openjdk/jdk8u-dev: 8284977: MetricsTesterCgroupV2.getLongValueEntryFromFile fails when named value doesn't exist

[Severin Gehwolf]

Changeset: b4a745d2
Author:    Kurashige Taizo <kurashige.taizo at fujitsu.com>
Committer: Severin Gehwolf <sgehwolf at openjdk.org>
Date:      2022-12-23 09:46:29 +0000
URL:       https://git.openjdk.org/jdk8u-dev/commit/b4a745d2f8b7ba78c51b4a4ec837cd636a93fa51

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

Backport-of: 444a0d98ac06ab043e3b11281234fd515abff302

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