Make the analysis server integration tests driver only.

pkg/analysis_server/test/integration/diagnostic/get_server_port_test.dart

 // Copyright (c) 2017, 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.
 
 import 'dart:convert';
 import 'dart:io';
 
 import 'package:analysis_server/plugin/protocol/protocol.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
@@ skipping 16 matching lines @@
     expect(result.port, isNonZero);
 
     // Connect to the server and verify that it's serving the status page.
     HttpClient client = new HttpClient();
     HttpClientRequest request = await client
         .getUrl(Uri.parse('http://localhost:${result.port}/status'));
     HttpClientResponse response = await request.close();
     String responseBody = await UTF8.decodeStream(response);
     expect(responseBody, contains('<title>Analysis Server</title>'));
   }
-
-  @override
-  bool get enableNewAnalysisDriver => true;
 }