RFR: 8367021: Regression in LocaleDataTest refactoring

[Naoto Sato]

A small fix to a locale test regression. Auto flush was incorrectly set to default (= false) by the prior fix.

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Commit messages:
 - initial commit

Changes: https://git.openjdk.org/jdk/pull/27130/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27130&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8367021
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/27130.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27130/head:pull/27130

PR: https://git.openjdk.org/jdk/pull/27130