[jdk11u-dev] RFR: 8241707: introduce randomness k/w to hotspot test suite

[Goetz Lindenmaier]

I backport this for parity with 11.0.16-oracle.

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Commit messages:
 - Backport 0eb72d4e7485b837c5690ac1c892a546e1554802

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/905/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=905&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8241707
  Stats: 5 lines in 2 files changed: 2 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/905.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/905/head:pull/905

PR: https://git.openjdk.java.net/jdk11u-dev/pull/905