RFR: 8374745: Test vmTestbase/nsk/monitoring/GarbageCollectorMXBean/CollectionCounters/CollectionCounters004/TestDescription.java failed

[Kevin Walls]

vmTestbase/CollectionCounters test still unreliable.
Avoid -Xcomp and use WhiteBox to cause GC.

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

Commit messages:
 - Remove remaining 'randomness'
 - 8374745: Test vmTestbase/nsk/monitoring/GarbageCollectorMXBean/CollectionCounters/CollectionCounters004/TestDescription.java failed

Changes: https://git.openjdk.org/jdk/pull/29122/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=29122&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8374745
  Stats: 57 lines in 5 files changed: 36 ins; 10 del; 11 mod
  Patch: https://git.openjdk.org/jdk/pull/29122.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29122/head:pull/29122

PR: https://git.openjdk.org/jdk/pull/29122