api v2 - responder updated

- new method respond_for_status
- fixed rendering of custom actions
api v2 - providers controller
api v2 - products controller
api v2 - users controller
api v2 - activation keys controller
api v2 - fix in locale module
api v2 - providers controller fix

- added missing rabl for listing products
api - v1 made default
rabl - utility for rendering hashes

Monkey patched into Rabl::Engine.
Roles controller to V2
api v2 - repositories controller
RolesLdapGroups controller to V2
Added missing end
api v2 - content_views and definitions controller
locale - fixes after refactoring
routing tests class name fix
rabl - new method render_for_async
Packages controller in V2
Util::Data::ostructize added
Removed templates routes, system_info_keys to default_info