Merge branch 'stable-2.16'
* stable-2.16: (47 commits)
pom: Fix plugin name to be all lowercase
Fix getRefsByPrefix usage
Adapt to CurrentUser#getUserName changes
Upgrade bazlets to latest stable-2.16 to build with 2.16.19 API
Upgrade bazlets to latest stable-2.16 to build with 2.16.18 API
Bump Bazel version to 3.1.0
Bump Bazel version to 3.0.0
Upgrade bazlets to latest stable-2.16 to build with 2.16.17 API
Upgrade bazlets to latest stable-2.16
Bump Bazel version to 2.2.0
Bump required Bazel version to 2.1.0
Upgrade bazlets to latest stable-2.16 to build with 2.16.16 API
Add an empty tools/BUILD file explicitly for Bazel
Upgrade bazlets to latest stable-2.16
Upgrade bazlets to latest stable-2.16
Upgrade bazlets to latest stable-2.15
Bump Bazel version to 2.0.0
Upgrade bazlets to latest stable-2.16 to build with 2.16.15 API
Upgrade bazlets to latest stable-2.16 to build with 2.16.14 API
Upgrade bazlets to latest stable-2.16 to build with 2.16.13 API
...
Change-Id: I64b8474ee652fee4463374770aa988901a48dfc6
