RFR: 8310890: Normalize identifier names

[Pavel Rappo]

Please review this cleanup PR to normalize names of identifiers which are Java variables/fields or tokens in text files. Those names either contain a pronoun that is very rarely used in code, or seem like they contain such a pronoun, which, in fact, they don't. Either way, the goal is to improve readability and clarity.

Also, this PR fixes a few related typos.

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Commit messages:
 - Improve further
 - Initial commit

Changes: https://git.openjdk.org/jdk/pull/14653/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14653&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8310890
  Stats: 184 lines in 10 files changed: 0 ins; 0 del; 184 mod
  Patch: https://git.openjdk.org/jdk/pull/14653.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14653/head:pull/14653

PR: https://git.openjdk.org/jdk/pull/14653