[code-reflection] Integrated: Moved common code to optkl

[Gary Frost]

Looks like a huge change. But mostly moving code down to optkl

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Commit messages:
 - Moved common code to optkl

Changes: https://git.openjdk.org/babylon/pull/781/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=781&range=00
  Stats: 1725 lines in 53 files changed: 891 ins; 579 del; 255 mod
  Patch: https://git.openjdk.org/babylon/pull/781.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/781/head:pull/781

PR: https://git.openjdk.org/babylon/pull/781