RFR: 8334333: Run test MissingResourceCauseTestRun.java with root user fails

[SendaoYan]

Hi all,
Testcase `test/jdk/java/util/ResourceBundle/Control/MissingResourceCauseTestRun.java` run fails with root user privileged. I think it's necessary to skip this testcase when user is root.
The change has been verified, only change the testcase, no risk.

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Commit messages:
 - 8334333: Run test MissingResourceCauseTestRun.java with root user fails

Changes: https://git.openjdk.org/jdk/pull/19732/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19732&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8334333
  Stats: 7 lines in 1 file changed: 6 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/19732.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19732/head:pull/19732

PR: https://git.openjdk.org/jdk/pull/19732