RFR: 8283606: Tests may fail with zh locale on MacOS [v2]

[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.

Vikey Chen has updated the pull request incrementally with one additional commit since the last revision:

  polish

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7924/files
  - new: https://git.openjdk.java.net/jdk/pull/7924/files/bd0ff44c..24dda53e

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7924&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7924&range=00-01

  Stats: 4 lines in 1 file changed: 2 ins; 2 del; 0 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