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

pkg/analysis_server/test/analysis/notification_analyzedFiles_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.
 
 import 'dart:async';
 
 import 'package:analysis_server/protocol/protocol.dart';
 import 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:analysis_server/src/constants.dart';
 import 'package:test/test.dart';
@@ skipping 26 matching lines @@
   void processNotification(Notification notification) {
     if (notification.event == ANALYSIS_ANALYZED_FILES) {
       AnalysisAnalyzedFilesParams params =
           new AnalysisAnalyzedFilesParams.fromNotification(notification);
       analyzedFilesReceived = true;
       analyzedFiles = params.directories;
     }
   }
 
   void setUp() {
-    enableNewAnalysisDriver = true;
     generateSummaryFiles = true;
     super.setUp();
     createProject();
   }
 
   test_afterAnalysis() async {
     addTestFile('''
 class A {}
 ''');
     await waitForTasksFinished();
@@ skipping 48 matching lines @@
     analyzedFilesReceived = false;
     modifyTestFile('import "/foo.dart";');
     await prepareAnalyzedFiles();
     assertHasFile('/foo.dart');
   }
 
   void unsubscribeAnalyzedFiles() {
     removeGeneralAnalysisSubscription(GeneralAnalysisService.ANALYZED_FILES);
   }
 }