RFR: 280: Notifier should support repo/branch prefixes

[Robin Westberg]

Hi all,

Please review this change that add support for repo/branch prefixes to the mails sent by the PR notifier.

Best regards,
Robin

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Commits:
 - 30f68ed5: Add optional subject prefix for pr notifier

Changes: https://git.openjdk.java.net/skara/pull/442/files
 Webrev: https://webrevs.openjdk.java.net/skara/442/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/SKARA-280
  Stats: 142 lines in 4 files changed: 135 ins; 0 del; 7 mod
  Patch: https://git.openjdk.java.net/skara/pull/442.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/442/head:pull/442

PR: https://git.openjdk.java.net/skara/pull/442