Switch analysis_server to use 'package:test'.

pkg/analysis_server/test/services/refactoring/rename_class_member_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.services.refactoring.rename_class_member;
 
 import 'package:analysis_server/plugin/protocol/protocol.dart';
 import 'package:analysis_server/src/services/correction/status.dart';
 import 'package:analyzer/src/generated/source.dart';
+import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
-import 'package:unittest/unittest.dart';
 
 import '../../utils.dart';
 import 'abstract_rename.dart';
 
 main() {
   initializeTestEnvironment();
-  defineReflectiveTests(RenameClassMemberTest);
+  defineReflectiveSuite(() {
+    defineReflectiveTests(RenameClassMemberTest);
+  });
 }
 
 @reflectiveTest
 class RenameClassMemberTest extends RenameRefactoringTest {
   test_checkFinalConditions_classNameConflict_sameClass() async {
     indexTestUnit('''
 class NewName {
   void test() {}
 }
 ''');
@@ skipping 864 matching lines @@
     // validate change
     return assertSuccessfulRefactoring('''
 class A<NewName> {
   NewName field;
   List<NewName> items;
   NewName method(NewName p) => null;
 }
 ''');
   }
 }