Merge branch 'stable-3.3' into stable-3.4

* stable-3.3:
  Upgrade Gerrit API to 3.3.3
  Upgrade Gerrit API to 3.3.2
  Set Gerrit API to 3.3.1-SNAPSHOT

Change-Id: I5276ac870378f4f54d787419780ee61ce57a0d73