comps updates for upcoming changes
Merge pull request #2737 from jlsherrill/comps_update

comps updates for upcoming changes
release-version-cache - ajax fetch of release versions in headpin mode

release-version-cache - fence katello-only spec tests

release-version-cache - moved releases call to ui controller instead of api
Merge pull request #2734 from thomasmckay/release-version-cache

release-version-cache - ajax fetch of release versions in headpin mode
WebUI elements throwing nomethod exception

Added unescape method to KT.utils to get rid of the exception