config_service: change error message for error 403.

appengine/config_service/ui/test/config-ui/config-set_test.html

Index: appengine/config_service/ui/test/config-ui/config-set_test.html
diff --git a/appengine/config_service/ui/test/config-ui/config-set_test.html b/appengine/config_service/ui/test/config-ui/config-set_test.html
index 978e4c0a327e3e4f8f648fd4eb70ec7e0962aac4..b73c3605a6947772a2dabd1b5a1190536b673ae4 100644
--- a/appengine/config_service/ui/test/config-ui/config-set_test.html
+++ b/appengine/config_service/ui/test/config-ui/config-set_test.html
@@ -293,8 +293,8 @@
           assert.equal(request.status, 403);
           config_set.addEventListener('fetchError', function() {
             assert.equal(config_set.isLoading, false);
-            assert.equal(config_set.errorMessage, "Authorization required to view this config set." +
-              " Please sign in.");
+            assert.equal(config_set.errorMessage, "Access denied. If you are not signed in, please do so. " +
+              "Otherwise, try again later.");
             done();
           }.bind(config_set));
         });