refactor(modules): restructure the module declaration

Before:
- we declare the controllers and services as an independent module and doing this way adding more complexity when running the unit test

After:
- we declare the controllers and services under the kabam.webrtc module and doing this way reducing the complexity when running the unit test
test(CI): set the AngularJS resolution to ~1.2

Notes:
Doing this way will let the TravisCI to resolve the resolution to AngularJS version ~1.2, otherwise the build will be terminated.
https://travis-ci.org/mykabam/kabam-plugin-webrtc/jobs/13440782#L1882
Merge branch 'restructure-the-source'