[code-reflection] Integrated: Renamed hat-core -> core and wrap to wraps

[Gary Frost]

Sadly I had to rename two dirs  This caused way too much churn ;) but cleans up the build.

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Commit messages:
 - Renamed hat-core -> core and wrap to wraps

Changes: https://git.openjdk.org/babylon/pull/472/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=472&range=00
  Stats: 212 lines in 182 files changed: 64 ins; 31 del; 117 mod
  Patch: https://git.openjdk.org/babylon/pull/472.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/472/head:pull/472

PR: https://git.openjdk.org/babylon/pull/472