RFR: 304: Squash additional commits into merge commits for merge PRs

[Robin Westberg]

Hi all,

Please review this change that squashes additional commits made on top of the first merge commit, to allow updating the
PR.

Best regards,
Robin

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Commit messages:
 - Initial implementation

Changes: https://git.openjdk.java.net/skara/pull/519/files
 Webrev: https://webrevs.openjdk.java.net/skara/519/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/SKARA-304
  Stats: 128 lines in 3 files changed: 123 ins; 1 del; 4 mod
  Patch: https://git.openjdk.java.net/skara/pull/519.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/519/head:pull/519

PR: https://git.openjdk.java.net/skara/pull/519