Merge branch 'stable-2.15'
* stable-2.15:
Upgrade bazlets to latest stable-2.15
Upgrade bazlets to latest stable-2.14
Upgrade bazlets to latest stable-2.15
Upgrade bazlets to latest stable-2.14
ListImportedProjects: Stop using deprecated fileTreeTraverser method
Upgrade bazlets to latest stable-2.15
Upgrade bazlets to latest stable-2.14
Upgrade bazlets to latest stable-2.15 to build with 2.15.14 API
Make transitive starlark loads explicit
Make transitive starlark loads explicit
Upgrade bazlets to latest stable-2.15 to build with 2.15.13 API
Upgrade bazlets to latest stable-2.14 to build with 2.14.20 API
Change-Id: I0cca836a40ff856b2e3c293e80c4250db45e9c07