RFR: 266: Allow getting commit metadata for a range

[Robin Westberg]

Hi all,

Please review this change that implements getting commit metadata for a range (for git repositories). This is in turn used in a few places in the bots where the full commit information isn't needed, such as counting them.

Best regards,
Robin

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Commits:
 - 7af18a94: Allow getting commit metadata for a range

Changes: https://git.openjdk.java.net/skara/pull/402/files
 Webrev: https://webrevs.openjdk.java.net/skara/402/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/SKARA-266
  Stats: 49 lines in 6 files changed: 33 ins; 1 del; 15 mod
  Patch: https://git.openjdk.java.net/skara/pull/402.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/402/head:pull/402

PR: https://git.openjdk.java.net/skara/pull/402