Switch analysis_server to use 'package:test'.

pkg/analysis_server/test/integration/server/set_subscriptions_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.integration.server.set.subscriptions;
 
 import 'dart:async';
 
 import 'package:analysis_server/plugin/protocol/protocol.dart';
+import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
-import 'package:unittest/unittest.dart';
 
 import '../../utils.dart';
 import '../integration_tests.dart';
 
 main() {
   initializeTestEnvironment();
-  defineReflectiveTests(Test);
+  defineReflectiveSuite(() {
+    defineReflectiveTests(Test);
+  });
 }
 
 @reflectiveTest
 class Test extends AbstractAnalysisServerIntegrationTest {
   test_setSubscriptions() {
     bool statusReceived = false;
     Completer analysisBegun = new Completer();
     onServerStatus.listen((_) {
       statusReceived = true;
     });
@@ skipping 24 matching lines @@
   var y;
 }''');
           // Analysis should eventually complete, and we should be notified
           // about it.
           return analysisFinished;
         });
       });
     });
   }
 }