Stock reservations behavior

* Prepare an Expedition create a Stock Movement and decremente order reservation
* Unset reservations for an Order after it was finalized, canceled or deleted
* Routes methods of AdminManager are moved to RoutesHelper class. 
  * A RoutesHelper exist on AdminManager but don't use it directly in GetRoutes action ! (See GetRoutes of Timeline to get an exemple)
* Routes urls, workflow and localizedWorkflow are now generate on the fly by Seo and Workflow plugins
* Cleanup routes.json (remove timeline, urls and workflow routes)