RFR: 8275727: Tests may fail with zh locale on MacOS

[Vikey Chen]

I have run tier-1 test with  `JTREG="VM_OPTIONS=-Duser.language=en -Duser.country=US"`, some tests still fail because of default locale, Most of them are langtools tests. 

On MacOS 12.1.

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Commit messages:
 - Tests may fail with zh locale on MacOS

Changes: https://git.openjdk.java.net/jdk/pull/7924/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7924&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8275727
  Stats: 37 lines in 9 files changed: 14 ins; 0 del; 23 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7924.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7924/head:pull/7924

PR: https://git.openjdk.java.net/jdk/pull/7924