Merge branch 'stable-2.16'

* stable-2.16:
  Upgrade bazlets to latest stable-2.16
  Upgrade bazlets to latest stable-2.15
  Align Eclipse compiler settings with core Gerrit's
  Upgrade bazlets to latest stable-2.14
  Update bazlets to fix build with bazel 0.23

Change-Id: Id19e90939bb7dfbbd53f9c6b78d6a67052b97297