[code-reflection] Integrated: Experimenting factories from pools

[Gary Frost]

Just some experiments separating types from 'collections' pools and factories.

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Commit messages:
 - Experimenting factories from pools

Changes: https://git.openjdk.org/babylon/pull/675/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=675&range=00
  Stats: 2720 lines in 30 files changed: 1471 ins; 1194 del; 55 mod
  Patch: https://git.openjdk.org/babylon/pull/675.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/675/head:pull/675

PR: https://git.openjdk.org/babylon/pull/675