Initial support for managing partial results from plugins

pkg/analysis_server/test/src/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.src;
 
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
+import 'plugin/test_all.dart' as plugin_all;
 import 'utilities/test_all.dart' as utilities_all;
 
 /**
  * Utility for manually running all tests.
  */
 main() {
   defineReflectiveSuite(() {
+    plugin_all.main();
     utilities_all.main();
   }, name: 'analysis_server');
 }