Merge branch 'stable-2.14' into stable-2.15

* stable-2.14:
  Update bazlets to latest stable-2.14 to build with 2.14.14 API
  Migrate `tools/bazel.rc` to `.bazelrc`
  Update bazlets to latest stable-2.14 to build with 2.14.13 API
  Update bazlets to latest stable-2.14 to use 2.14.12 API
  RestForwarder: Avoid retrying non recoverable exceptions

Change-Id: Ib87307cff973ef8203faebf1e76c320cbe731674