[code-reflection] Integrated: Switch to using maven as primary build

[Gary Frost]

Here we switch to using maven as the primary build.

So hopefully 

cd hat
. ./env.bash
mvn clean compile jar:jar install

Will work for all. 

Some supporting scripts added too.   
Specifically `hatrun.bash`


bash ./hatrun.bash opencl violajones ViolaJonesCompute


Some cmake top level artifacts remain in case something is missing..

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Commit messages:
 - Switch to using maven as primary build - whitespace
 - Switch to using maven as primary build

Changes: https://git.openjdk.org/babylon/pull/128/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=128&range=00
  Stats: 652 lines in 27 files changed: 571 ins; 34 del; 47 mod
  Patch: https://git.openjdk.org/babylon/pull/128.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/128/head:pull/128

PR: https://git.openjdk.org/babylon/pull/128