RFR: 7507: Fixing project setup [v2]

[Marcus Hirt]

> ...and some cleanup.

Marcus Hirt has updated the pull request incrementally with one additional commit since the last revision:

  Review feedback

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Changes:
  - all: https://git.openjdk.java.net/jmc/pull/355/files
  - new: https://git.openjdk.java.net/jmc/pull/355/files/70b3981c..9cca545b

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jmc&pr=355&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jmc&pr=355&range=00-01

  Stats: 2 lines in 2 files changed: 1 ins; 1 del; 0 mod
  Patch: https://git.openjdk.java.net/jmc/pull/355.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/355/head:pull/355

PR: https://git.openjdk.java.net/jmc/pull/355