[code-reflection] Integrated: hat opwrapper removal round 2

[Gary Frost]

Second round of hat OpWrapper removal.

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Commit messages:
 - hat opwrapper removal round 2

Changes: https://git.openjdk.org/babylon/pull/537/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=537&range=00
  Stats: 56 lines in 8 files changed: 6 ins; 29 del; 21 mod
  Patch: https://git.openjdk.org/babylon/pull/537.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/537/head:pull/537

PR: https://git.openjdk.org/babylon/pull/537