[code-reflection] Integrated: Hat simplify phases

[Gary Frost]

Some renaming and removal of duplicated classes.

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Commit messages:
 - cleaning up kernel transform phases - common renaming
 - cleaning up kernel transform phases - common renaming

Changes: https://git.openjdk.org/babylon/pull/792/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=792&range=00
  Stats: 872 lines in 26 files changed: 392 ins; 439 del; 41 mod
  Patch: https://git.openjdk.org/babylon/pull/792.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/792/head:pull/792

PR: https://git.openjdk.org/babylon/pull/792