Merge branch 'stable-2.14' into stable-2.15

* stable-2.14:
  bazlets: Replace native.git_repository with skylark rule
  Upgrade mockito to 2.23.0
  Update bazlets to latest stable-2.14 to build with 2.14.15 API

Change-Id: Iacedeed2f961389034cb0587b725b55feaf1b16e