Merge branch 'stable-2.10' into stable-2.11

* stable-2.10:
  Consume JGit artifacts from Maven Central
  Add release notes for Gerrit v2.10.8
  Add release notes for Gerrit v2.9.5
  Set version to 2.10.8
  Set version to 2.9.5

Change-Id: Ia8f3388b66c80b8322326c4c1a1c356c18893124