Merge branch 'stable-2.15'

* stable-2.15:
  Update bazlets to latest revision on stable-2.14
  Automate the SonarQube analysis with bazel

Change-Id: Ib5ace5f1495b5f3f98358d5a41f97f1576c1440c
tree: e6e6e48cac0e296aaa999fd9ff62987a39a75387
  1. src/
  2. tools/
  3. .gitignore
  4. bazlets.bzl
  5. BUILD
  6. WORKSPACE