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

pkg/analysis_server/test/domain_completion_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.domain.completion;
 
 import 'dart:async';
 
 import 'package:analysis_server/protocol/protocol.dart';
 import 'package:analysis_server/protocol/protocol_generated.dart';
@@ skipping 13 matching lines @@
 import 'mocks.dart' show pumpEventQueue;
 
 main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(CompletionDomainHandlerTest);
   });
 }
 
 @reflectiveTest
 class CompletionDomainHandlerTest extends AbstractCompletionDomainTest {
-  @override
-  void setUp() {
-    enableNewAnalysisDriver = true;
-    super.setUp();
-  }
-
   test_ArgumentList_constructor_named_param_label() async {
     addTestFile('main() { new A(^);}'
         'class A { A({one, two}) {} }');
     await getSuggestions();
     assertHasResult(CompletionSuggestionKind.NAMED_ARGUMENT, 'one: ',
         relevance: DART_RELEVANCE_NAMED_PARAMETER);
     assertHasResult(CompletionSuggestionKind.NAMED_ARGUMENT, 'two: ',
         relevance: DART_RELEVANCE_NAMED_PARAMETER);
     expect(suggestions, hasLength(2));
   }
@@ skipping 731 matching lines @@
 
   @override
   Future sort(
       CompletionRequest request, Iterable<CompletionSuggestion> suggestions) {
     if (!enabled) {
       throw 'unexpected sort';
     }
     return new Future.value();
   }
 }