[jdk11u-dev] RFR: 8255277: randomDelay in DrainDeadlockT and LoggingDeadlock do not randomly delay

[Amos Shi]

Backport of [JDK-8255277](https://bugs.openjdk.org/browse/JDK-8255277)

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Commit messages:
 - Backport a93841ac9cbf69dc7484e96a16cb64988c50f98d

Changes: https://git.openjdk.org/jdk11u-dev/pull/2307/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2307&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8255277
  Stats: 17 lines in 2 files changed: 13 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2307.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2307/head:pull/2307

PR: https://git.openjdk.org/jdk11u-dev/pull/2307