[jdk17u-dev] RFR: 8302152: Speed up tests with infinite loops, sleep less

[Victor Rudometov]

Backport for https://bugs.openjdk.org/browse/JDK-8302152

Clean backport, test update, low risk
Tests pass

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Commit messages:
 - Backport a9a53f417d017c6e92d1f0331359037815bd431e

Changes: https://git.openjdk.org/jdk17u-dev/pull/1179/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1179&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8302152
  Stats: 10 lines in 5 files changed: 2 ins; 0 del; 8 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1179.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/1179/head:pull/1179

PR: https://git.openjdk.org/jdk17u-dev/pull/1179