[code-reflection] Integrated: Hat view more tinkering

[Gary Frost]

Ignore this ;) I am migrating view example across to use vector types compatible with HAT.  

Work in progress.. more to come,

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Commit messages:
 - slowly migrating to removing pools
 - safety checkin #4 simplify
 - safety checkin #3 - use old for now
 - safety checkin #2
 - safety checkin

Changes: https://git.openjdk.org/babylon/pull/650/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=650&range=00
  Stats: 1913 lines in 10 files changed: 1673 ins; 165 del; 75 mod
  Patch: https://git.openjdk.org/babylon/pull/650.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/650/head:pull/650

PR: https://git.openjdk.org/babylon/pull/650