RFR: 8324082: more monitoring test timeout adjustments

[Daniel D. Daugherty]

Trivial fixes to adjust more monitoring test timeouts.

See the bug report for the gory timeout details.

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Commit messages:
 - 8324082: more monitoring test timeout adjustments

Changes: https://git.openjdk.org/jdk/pull/17478/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17478&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8324082
  Stats: 14 lines in 14 files changed: 0 ins; 0 del; 14 mod
  Patch: https://git.openjdk.org/jdk/pull/17478.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17478/head:pull/17478

PR: https://git.openjdk.org/jdk/pull/17478