Switch analysis_server to use 'package:test'.

pkg/analysis_server/test/edit/organize_directives_test.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.edit.organize_directives;
 
 import 'dart:async';
 
 import 'package:analysis_server/plugin/protocol/protocol.dart';
 import 'package:analysis_server/src/edit/edit_domain.dart';
 import 'package:plugin/manager.dart';
+import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
-import 'package:unittest/unittest.dart' hide ERROR;
 
 import '../analysis_abstract.dart';
 import '../mocks.dart';
 import '../utils.dart';
 
 main() {
   initializeTestEnvironment();
-  defineReflectiveTests(OrganizeDirectivesTest);
+  defineReflectiveSuite(() {
+    defineReflectiveTests(OrganizeDirectivesTest);
+  });
 }
 
 @reflectiveTest
 class OrganizeDirectivesTest extends AbstractAnalysisTest {
   SourceFileEdit fileEdit;
 
   @override
   void setUp() {
     super.setUp();
     createProject();
@@ skipping 131 matching lines @@
     expect(resultCode, expectedCode);
   }
 
   void _requestOrganize() {
     Request request = new EditOrganizeDirectivesParams(testFile).toRequest('0');
     Response response = handleSuccessfulRequest(request);
     var result = new EditOrganizeDirectivesResult.fromResponse(response);
     fileEdit = result.edit;
   }
 }