Merge branch 'stable-3.8' into stable-3.9

* stable-3.8:
  Add Jenkins pipeline for CI/CD validation with Gerrit-CI

Change-Id: I7acfe1dfe68b58ca989a6e90ea3a3b5e51438885
tree: c3435afcd2cca3a97ca8669e9f2caeb9971bfc04
  1. src/
  2. BUILD
  3. external_plugin_deps.bzl
  4. Jenkinsfile