Added attrs field to permission for target=subtree

Permission form was missing attrs field for target=subtree. All other target types have it.

It uses multivalued text widget, same as filter, because we can't predict the target type.

https://fedorahosted.org/freeipa/ticket/2592

install/ui/aci.js

@@ -836,6 +836,9 @@ IPA.permission_target_policy = function (widget_name) {
             additional: [
                 {
                     name: 'memberof'
+                },
+                {
+                    name: 'attrs_multi'
                 }
             ]
         },

install/ui/test/aci_tests.js

@@ -282,7 +282,7 @@ test("Testing subtree target.", function() {
 
     same(record.subtree[0], data.result.result.subtree, 'subtree set correctly');
 
-    same(get_visible_rows(target_widget), ['memberof', 'subtree'], 'subtree row visible');
+    same(get_visible_rows(target_widget), ['memberof', 'subtree', 'attrs_multi'], 'subtree row visible');
 });