Initial commit for service controller catalog manager

 - Refactor for generating auth headers
 - Refactor auth token generator for http requests
 - Comment out handles fetching until its implemented in Services controller
 - Use CC-v2 Service description (remove custom service controller service object)
 - Fix urls for service controller service advertiser
 - Create SC plan / SC service that overrides the to_hash function to make
   payload in-line with the services controller schema
 - SC catalog manager now creates/updates service offering and service plans

Catalog manager - SCV1- Spec
Merge pull request #1 from hgadgil/master

Implement Service Controller  - Service Gateway interface (Part I)