Renommage package composer.

composer.json

 {
-    "name": "unicaen/unicaen-auth",
-    "description": "Module d'authentification pour les applis ZF2 de l'UCBN",
+    "name": "unicaen/auth",
+    "description": "Module d'authentification pour les applications Unicaen",
     "repositories": [
         {
             "type": "composer",