More fixes for failures on the Windows bot

pkg/analysis_server/test/services/test_all.dart

 // Copyright (c) 2014, 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.
 
 library test.services;
 
-import 'package:unittest/unittest.dart';
-
+import '../utils.dart';
 import 'completion/test_all.dart' as completion_all;
 import 'correction/test_all.dart' as correction_all;
 import 'dependencies/test_all.dart' as dependencies_all;
 import 'index/test_all.dart' as index_all;
 import 'refactoring/test_all.dart' as refactoring_all;
 import 'search/test_all.dart' as search_all;
 
 /// Utility for manually running all tests.
 main() {
-  groupSep = ' | ';
+  initializeTestEnvironment();
   completion_all.main();
   correction_all.main();
   dependencies_all.main();
   index_all.main();
   refactoring_all.main();
   search_all.main();
 }