Update bazlets to Gerrit API 2.15.13

* Update the WORKSPACE to use the released API instead of snapshot
* Use skylark instead of native.git_repository
* Move now-unsupported bazel.rc content to .bazelrc
* The same changes need to be applied to the files in the subdirectories

Also fixes build issues and API compatibility in a few of the examples.

Change-Id: I398d305c93f7919b742b200989196ad83f3387e1
128 files changed