Switch analysis_server to use 'package:test'.

pkg/analysis_server/test/search/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.search;
 
-import 'package:unittest/unittest.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import '../utils.dart';
 import 'element_references_test.dart' as element_references_test;
 import 'member_declarations_test.dart' as member_declarations;
 import 'member_references_test.dart' as member_references_test;
 import 'search_result_test.dart' as search_result_test;
 import 'top_level_declarations_test.dart' as top_level_declarations_test;
 import 'type_hierarchy_test.dart' as type_hierarchy_test;
 
 /**
  * Utility for manually running all tests.
  */
 main() {
   initializeTestEnvironment();
-  group('search', () {
+  defineReflectiveSuite(() {
     element_references_test.main();
     member_declarations.main();
     member_references_test.main();
     search_result_test.main();
     top_level_declarations_test.main();
     type_hierarchy_test.main();
-  });
+  }, name: 'search');
 }