[jdk24u] RFR: 8350818: Improve OperatingSystemMXBean cpu load tests to not accept -1.0 by default

[Ramkumar Sunderbabu]

…1.0 by default

Reviewed-by: kevinw

-------------

Commit messages:
 - 8350818: Improve OperatingSystemMXBean cpu load tests to not accept -1.0 by default

Changes: https://git.openjdk.org/jdk24u/pull/104/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk24u&pr=104&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8350818
  Stats: 5 lines in 2 files changed: 0 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk24u/pull/104.diff
  Fetch: git fetch https://git.openjdk.org/jdk24u.git pull/104/head:pull/104

PR: https://git.openjdk.org/jdk24u/pull/104