RFR: 8253497: Core Libs Terminology Refresh

[Brent Christian]

This is part of an effort in the JDK to replace archaic/non-inclusive words with more neutral terms (see JDK-8253315 for details).

Here are the changes covering core libraries code and tests.  Terms were changed as follows:
1. grandfathered -> legacy
2. blacklist -> filter or reject
3. whitelist -> allow or accept
4. master -> coordinator
5. slave -> worker

Addressing similar issues in upstream 3rd party code is out of scope of this PR.  Such changes will be picked up from their upstream sources.

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Commit messages:
 - Terminology Cleanup
 - corelibs terminology refresh - bchristi

Changes: https://git.openjdk.java.net/jdk/pull/1771/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1771&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8253497
  Stats: 82 lines in 15 files changed: 1 ins; 0 del; 81 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1771.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1771/head:pull/1771

PR: https://git.openjdk.java.net/jdk/pull/1771