Reverse the sense of the flag to make it easier to find test that need to be converted

pkg/analysis_server/test/edit/statement_completion_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.
 
 library test.edit.statement_completion;
 
 import 'package:analysis_server/protocol/protocol.dart';
 import 'package:analysis_server/protocol/protocol_generated.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 '../analysis_abstract.dart';
 
 main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(StatementCompletionTest);
   });
 }
 
 @reflectiveTest
 class StatementCompletionTest extends AbstractAnalysisTest {
   SourceChange change;
 
   @override
   void setUp() {
-    enableNewAnalysisDriver = true;
     super.setUp();
     createProject();
     ExtensionManager manager = new ExtensionManager();
     manager.processPlugins([server.serverPlugin]);
     handler = new EditDomainHandler(server);
   }
 
   test_plainEnterFromStart() async {
     addTestFile('''
 main() {
@@ skipping 83 matching lines @@
   }
 
   _prepareCompletionAt(int offset) async {
     Request request =
         new EditGetStatementCompletionParams(testFile, offset).toRequest('0');
     Response response = await waitResponse(request);
     var result = new EditGetStatementCompletionResult.fromResponse(response);
     change = result.change;
   }
 }