RFR: Add a link to the commit to related issues

[Robin Westberg]

Hi all,

Please review this change that adds a proper link to a commit, in addition to the existing comment currently made, when a commit referencing an issue is integrated.

Best regards,
Robin

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Commits:
 - 5f64d36d: Add a link to the commit as well

Changes: https://git.openjdk.java.net/skara/pull/311/files
 Webrev: https://webrevs.openjdk.java.net/skara/311/webrev.00
  Stats: 32 lines in 3 files changed: 25 ins; 1 del; 6 mod
  Patch: https://git.openjdk.java.net/skara/pull/311.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/311/head:pull/311

PR: https://git.openjdk.java.net/skara/pull/311