including engine files in katello-common for headpin
Removing integration_spec folder

Removing integration_spec folder since the code in it isn't being used or
maintained.
Rubocop: Cleaning up helpers
Merge pull request #2860 from daviddavis/temp/20130831082813

Rubocop: Cleaning up helpers
Merge pull request #2835 from jlsherrill/headpin_fix

including engine files in katello-common for headpin
987936-link-helper - using search for crosslinking
Merge pull request #2871 from daviddavis/thomasmckay-987936-link-helper

987936-link-helper - using search for crosslinking
Merge pull request #2868 from daviddavis/temp/20130903110224

Removing integration_spec folder