RFR: 321: No RFR mail is sent if a PR is integrated very quickly

[Robin Westberg]

Hi all,

Please review this change that enables sending notification emails for PRs that have been integrated before an RFR mail
was created.

Best regards,
Robin

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Commit messages:
 - Add support for sending mails for quickly integrated PRs

Changes: https://git.openjdk.java.net/skara/pull/538/files
 Webrev: https://webrevs.openjdk.java.net/skara/538/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/SKARA-321
  Stats: 207 lines in 8 files changed: 185 ins; 1 del; 21 mod
  Patch: https://git.openjdk.java.net/skara/pull/538.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/538/head:pull/538

PR: https://git.openjdk.java.net/skara/pull/538