Switch user_page to redirect to prevent router test failures.

core/modules/user/user.pages.inc

@@ -420,9 +420,7 @@ function user_page() {
   global $user;
   if ($user->uid) {
     // @todo: Cleaner sub request handling.
-    $request = drupal_container()->get('request');
-    $subrequest = Request::create('/user/' . $user->uid, 'GET', $request->query->all(), $request->cookies->all(), array(), $request->server->all());
-    return drupal_container()->get('http_kernel')->handle($subrequest, HttpKernelInterface::SUB_REQUEST);
+    drupal_goto('user/' . $user->uid);
   }
   else {
     return drupal_get_form('user_login');