[code-reflection] Integrated: Discovered some properties are inherited in maven

[Gary Frost]

After discoverig that some properties can be set once in the 'root' pom, I cleaned up the maven pom.xml file tree.

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Commit messages:
 - Discovered some properties are inherited in maven

Changes: https://git.openjdk.org/babylon/pull/126/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=126&range=00
  Stats: 364 lines in 13 files changed: 18 ins; 290 del; 56 mod
  Patch: https://git.openjdk.org/babylon/pull/126.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/126/head:pull/126

PR: https://git.openjdk.org/babylon/pull/126