Merge branch 'stable-3.0' into stable-3.1

* stable-3.0:
  Set version to 2.16.28-SNAPSHOT
  Set version to 2.16.27
  ForRef#check should permit internal users to read all refs
  Use NoteDb sequence seed for groups sequence initialization
  GroupsOnInit: Remove unused dependency on ReviewDb
  Use NoteDb sequence seed for accounts sequence initialization
  Do not use ReviewDb anymore when is disabled
  ForRef#check should permit internal users to read all refs

Change-Id: I2d79a07f22b449b17ed87d0b1bf419016fe736b2