[jdk11u-dev] RFR: 8209768: Refactor java/util/prefs/CheckUserPrefsStorage.sh to plain java test

Wed Aug 11 08:05:54 UTC 2021

Backporting for `11.0.13-oracle` parity.

Additional testing:
 - [x] New test passes
 - [x] `java/util/prefs` tests pass
 - [x] Eyeballing new test output

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Commit messages:
 - Backport f095a9ee49ba0e36e0503b6db1dce81df66f5356

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/230/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=230&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8209768
  Stats: 125 lines in 4 files changed: 50 ins; 71 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/230.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/230/head:pull/230

PR: https://git.openjdk.java.net/jdk11u-dev/pull/230