[jdk17u-dev] RFR: 8318154: Improve stability of WheelModifier.java test

[Andrew Lu]

Backport for JDK-8318154.

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

Commit messages:
 - Backport 668d4b077f260a30a90842a01b38a9cf6718d418

Changes: https://git.openjdk.org/jdk17u-dev/pull/2128/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2128&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8318154
  Stats: 25 lines in 1 file changed: 16 ins; 1 del; 8 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2128.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2128/head:pull/2128

PR: https://git.openjdk.org/jdk17u-dev/pull/2128