[code-reflection] Integrated: switch text tools to use Regex

[Gary Frost]

We have simpler Regex tool in HAT (more amenable to pattren switching) so switching uses to it

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Commit messages:
 - switch text tools to use Regex

Changes: https://git.openjdk.org/babylon/pull/735/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=735&range=00
  Stats: 109 lines in 8 files changed: 13 ins; 22 del; 74 mod
  Patch: https://git.openjdk.org/babylon/pull/735.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/735/head:pull/735

PR: https://git.openjdk.org/babylon/pull/735