Merge branch 'stable-2.10'

* stable-2.10:
  Consume API version 2.9
  Suppress unused method warnings
  Consume API version 2.10
  fix typo, 'action.config' should be 'actions.config'
  Make work with Gerrit core stable-2.10 branch.

Merge made by the 'ours' strategy.

Change-Id: I0f0b1464d394dbc43c7c49287d2de50d7671ddad