Merge branch 'stable-2.14' into stable-2.15

* stable-2.14:
  Align Eclipse compiler settings with core Gerrit's
  Add standalone bazel build
  Remove .buckconfig

Also adjust the bazlets revision in WORKSPACE so that the standalone
build uses the 2.15.7 API.

Change-Id: Ic006bbccf9361db73ec8822ebbf4557023cd0005