This is a precursor to the future removal of the `COMPAT` locale data provider. Before the actual removal of the provider, warn the users who explicitly specify `COMPAT` at the command line in order for their smooth migration to CLDR. A CSR has also been drafted.
------------- Commit messages: - clean-up - Added @implNote. Check "JRE" as well. Clean-up - Spec change to LocaleServiceProvider - clean-up - added a test - 8304982: Emit warning for removal of `COMPAT` provider Changes: https://git.openjdk.org/jdk/pull/13302/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13302&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8304982 Stats: 91 lines in 4 files changed: 83 ins; 2 del; 6 mod Patch: https://git.openjdk.org/jdk/pull/13302.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/13302/head:pull/13302 PR: https://git.openjdk.org/jdk/pull/13302
