RFR: 445: The issue notifier should not process commits for downstream projects

[Robin Westberg]

Hi all,

Please review this change that makes it possible to avoid posting comments in issues merged into downstream projects.

Best regards,
Robin

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Commit messages:
 - Restore the pronly mode

Changes: https://git.openjdk.java.net/skara/pull/688/files
 Webrev: https://webrevs.openjdk.java.net/skara/688/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/SKARA-445
  Stats: 57 lines in 4 files changed: 33 ins; 19 del; 5 mod
  Patch: https://git.openjdk.java.net/skara/pull/688.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/688/head:pull/688

PR: https://git.openjdk.java.net/skara/pull/688