Merge branch 'stable-2.15'

* stable-2.15:
  Format BUILD file with buildifier 0.12.0
  Format .bzl files with buildifier 0.12.0
  Update bazlets to use 2.14.10 API
  Remove wildcard import
  Upgrade bazlets to latest revision on stable-2.14 to use 2.14.9 API
  Trigger the reload of Change notes before reindexing

Change-Id: I80c40f71bb3c88024584136d9167cf2d8dcace4b