Send every imported item to the queue

Instead of queing real Entry to process, we queue all the item to import from Pocket in a raw format.
Then, the worker retrieve that information, find / create the entry and save it.

src/Wallabag/UserBundle/Resources/config/services.yml

@@ -14,3 +14,9 @@ services:
             - "@router"
         tags:
             - { name: kernel.event_subscriber }
+
+    wallabag_user.user_repository:
+        class: Wallabag\UserBundle\Repository\UserRepository
+        factory: [ "@doctrine.orm.default_entity_manager", getRepository ]
+        arguments:
+            - WallabagUserBundle:User