testMe : add a fieldgroup with only optional field in it

EditorialModel/test/me.json

@@ -55,5 +55,11 @@
   },
   "19" : {
     "component":"EmType", "name":"numero", "string":"{\"fre\":\"Numéro\"}", "help_text":"{}", "rank":"2", "date_update":"", "date_create":"", "class_id":"13", "icon":"0", "sortcolumn":"rank"
+  },
+  "20" : {
+    "component":"EmFieldGroup", "name":"couleurs", "string":"{\"fre\":\"Couleurs\"}", "help_text":"{}", "rank":"3", "date_update":"", "date_create":"", "class_id":"1"
+  },
+  "21" : {
+    "component":"EmField", "name":"bleu", "string":"{\"fre\":\"Bleu\"}", "help_text":"{}", "rank":"1", "date_update":"", "date_create":"", "fieldtype":"char", "fieldgroup_id":"20", "rel_field_id":"", "optional":1, "internal":"", "icon":"0"
   }
 }