Merge pull request #3512 from jmontleon/use-rhscl

remove packages available via rhscl
scope-app - add Katello:: to all ApplicationController
Merge pull request #3519 from thomasmckay/scope-app

scope-app - add Katello:: to all ApplicationController
Removing duplicate in_environment scope
Merge pull request #3522 from daviddavis/temp/20131217141032

Removing duplicate in_environment scope
remove packages that are unnecessary for katello-engine