Alias the slugger to fix fixtures loading

Author: ogizanagi

app/config/services.yml

@@ -44,3 +44,9 @@ services:
 
     # needed for the localizeddate Twig filter
     Twig\Extensions\IntlExtension: ~
+
+    # the slugger service needs a public alias for getting it from
+    # the container when loading doctrine fixtures
+    slugger:
+        alias: AppBundle\Utils\Slugger
+        public: true