Add standard methods to the Limits API

- Added create, delete, detail, show, and update
  stubs to the Limits API
- Added unit test cases
Fixes bug 869877

Change-Id: I112a8016ff2cf83009b3bcfe2fe6307568ce7334
Merge "Add standard methods to the Limits API"
Merge remote-tracking branch 'm_src_repo/master' into build-temp