[code-reflection] Integrated: Hat move config to core

[Gary Frost]

By moving Config up to core (from FFI) we can take advantage of it from anywhere in the HAT code. 

At present we still only access it from FFI.  I plan to make more general changes in future. 

Also switched `java @hat/bld` to actually use the new `job.jar` based build (same for @hat/run ... sanity .. test clean etc) 

Have not removed the Script based tools. But will soon.  If you see a problem you can revert to the prev version using  `java @hat/obld ....` instead of `java @hat/bld ...`

-------------

Commit messages:
 - Moved config out of ffi also switched to using job.jar based bld,run etc
 - Moved config out of ffi also switched to using job.jar based bld,run etc

Changes: https://git.openjdk.org/babylon/pull/589/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=589&range=00
  Stats: 804 lines in 25 files changed: 382 ins; 325 del; 97 mod
  Patch: https://git.openjdk.org/babylon/pull/589.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/589/head:pull/589

PR: https://git.openjdk.org/babylon/pull/589