fixes #2248 adds api controllers and actions to access_permissions.rb
Always use multi-select widget for taxonomies in host group
fixes #2407 - Add STI to settings model

Also adds some tests for rendering new/missing STI models, and
refactors the old default_settings loader into the new sub-models.
fixes #2430 - undefined method gettext_translation_for_attribute_name
Added rails and dependencies to comp
fixes #2428 - a workaround for an issue with SETTINGS[:libvirt] not being properly initialized in rpm environments

remved a redundant comment