[code-reflection] Integrated: HAT remove OpWrapper round 3

[Gary Frost]

Round 3 removing OpWrapper. 

Moved common code into RootSet.  

Attempting to make all the OpWrapper method static so we can build a static class toolkit instead of wrapping each op.

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Commit messages:
 - HAT remove OpWrapper round 3

Changes: https://git.openjdk.org/babylon/pull/538/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=538&range=00
  Stats: 189 lines in 16 files changed: 42 ins; 118 del; 29 mod
  Patch: https://git.openjdk.org/babylon/pull/538.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/538/head:pull/538

PR: https://git.openjdk.org/babylon/pull/538