Remove full name from adding user to user group dialog

As the 'cn' is not in the response of user-show there is empty column in adder dialog.
Therefore the column was removed.

https://fedorahosted.org/freeipa/ticket/6055

Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>

install/ui/src/freeipa/group.js

@@ -104,14 +104,9 @@ return {
                 'title'
             ],
             adder_columns:[
-                {
-                    name: 'cn',
-                    width: '100px'
-                },
                 {
                     name: 'uid',
-                    primary_key: true,
-                    width: '100px'
+                    primary_key: true
                 }
             ]
         },