Merge branch 'stable-2.14' into stable-2.15

* stable-2.14:
  FieldType: Remove unnecessary KEYWORD type

Change-Id: I7e099a909e834eb96fdcce7894ad43a6d78959dd
tree: 388ed2098e5fac73acdab4d9d4c01f9af8902688
  1. gerrit-acceptance-tests/
  2. gerrit-elasticsearch/
  3. gerrit-pgm/