Re-organize and comment clean-up

pkg/analyzer_plugin/test/utilities/subscriptions/test_all.dart

 // Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import 'subscription_manager_test.dart' as subscription_manager_test;
 
 main() {
   defineReflectiveSuite(() {
     subscription_manager_test.main();
-  }, name: 'utilities');
+  }, name: 'subscriptions');
 }