Merge branch 'stable-2.16'

* stable-2.16:
  Format Java files with google-java-format 1.7
  Upgrade bazlets to latest stable-2.16
  Upgrade mockito-core to 2.25.0
  Upgrade bazlets to latest stable-2.15
  Upgrade bazlets to latest stable-2.14
  Update bazlets to fix build with bazel 0.23

Change-Id: I4c72fddbab04cede2b3147842213477c4471ce29