Merge branch 'stable-2.16' into stable-3.0

* stable-2.16:
  Bump bazel version to 1.0.0
  Add information about LFS config to PolyGerrit UI
  Upgrade JGit to 5.1.11.201909031202-r
  Upgrade bazlets to latest stable-2.16 to build with 2.16.12 API
  Upgrade bazlets to latest stable-2.15 to build with 2.15.17 API

Change-Id: I4650bf89d7f2d0b0c7cfbc1b0a6dd0a58285cfa3