[jdk17u-dev] RFR: 8310818: Refactor more Locale tests to use JUnit

Fri Apr 5 13:41:43 UTC 2024

I backport this to streamline testing in jdk17. 

Automatic deletion of test/jdk/java/util/Locale/Bug4175998Test.java failed because
"8303917: Update ISO 639 language codes table" is not in 17.

The rest of files applied clean. 

I had to fix ISO639 to use Java 17.

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Commit messages:
 - Fix buidl
 - Backport 12e943091071b02b5756b57527a5f86a3d881cb8

Changes: https://git.openjdk.org/jdk17u-dev/pull/2373/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2373&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8310818
  Stats: 1941 lines in 13 files changed: 681 ins; 1250 del; 10 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2373.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2373/head:pull/2373

PR: https://git.openjdk.org/jdk17u-dev/pull/2373