Merge branch 'stable-3.0' into stable-3.1
* stable-3.0:
Introduce a configuration to define time lapse for rate limiter
Upgrade bazlets to latest stable-3.0 to build with 3.0.15 API
Upgrade bazlets to latest stable-2.16 to build with 2.16.26 API
Upgrade bazlets to latest stable-2.16 to build with 2.16.23 API
Conflict resolution for WORKSPACE is to keep the original bazlets
version. Also, adjust the test to use project.nameKeys instead of new
Project.NameKeys.
Change-Id: Ic5af1ac3006d66884ed5d257bacee8a5f26a3b69