Fixes test failures caused by depending on the default locale. Specifying explicit `Locale.US` will do.
------------- Commit messages: - 8283842: TestZoneTextPrinterParser.test_roundTripAtOverlap fails: DateTimeParseException Changes: https://git.openjdk.java.net/jdk/pull/8045/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8045&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8283842 Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod Patch: https://git.openjdk.java.net/jdk/pull/8045.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/8045/head:pull/8045 PR: https://git.openjdk.java.net/jdk/pull/8045
