Merge branch 'stable-2.14' into stable-2.15

* stable-2.14:
  bazlets: Replace native.git_repository with skylark rule
  Harmonize external dependency names to use hyphen
  Upgrade mockito to 2.23.0
  Update bazlets to latest stable-2.14 to build with 2.14.15 API

Change-Id: I3281d0fc12dc27208708621a75a5c93b1a4a0d9e