Merge branch 'stable-3.0' into stable-3.1 * stable-3.0: Set Gerrit to 3.0.10 Set Gerrit to 2.16.21 Set Gerrit to 2.15.19 Set Gerrit to 2.14.21 Set version to 2.16.20 Change-Id: I6954ebd31942ba6d1b49d78b66c4d14a7a978007