[code-reflection] Integrated: Phase tranform refactoring and fixed before/after CallSite tracking

[Gary Frost]

Continued refactoring phase transforms 

Also fixed issue with CallSite.  So nowe can turn on SHOW_COMPILATION_PHASES without CALLSITE_TRACING

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Commit messages:
 - More phase tranform refactoring Also fixed before/after CallSite tracking issue

Changes: https://git.openjdk.org/babylon/pull/631/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=631&range=00
  Stats: 87 lines in 4 files changed: 33 ins; 23 del; 31 mod
  Patch: https://git.openjdk.org/babylon/pull/631.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/631/head:pull/631

PR: https://git.openjdk.org/babylon/pull/631