Switch the default from non-driver to driver in several tests

pkg/analysis_server/test/services/index/index_test.dart

 // Copyright (c) 2016, 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/src/services/index/index.dart';
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/summary/idl.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 import 'package:typed_mock/typed_mock.dart';
 
 import '../../abstract_single_unit.dart';
 
 main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(IndexTest);
   });
 }
 
 @reflectiveTest
 class IndexTest extends AbstractSingleUnitTest {
   Index index = createMemoryIndex();
 
+  @override
+  bool get enableNewAnalysisDriver => false;
+
   /**
    * Return the [Location] with given properties, or fail.
    */
   Location findLocation(List<Location> locations, String libraryUri,
       String unitUri, int offset, int length, bool isQualified) {
     for (Location location in locations) {
       if (location.libraryUri == libraryUri &&
           location.unitUri == unitUri &&
           location.offset == offset &&
           location.length == length &&
@@ skipping 332 matching lines @@
   Future<Source> _indexUnit(String path, String code) async {
     Source source = addSource(path, code);
     CompilationUnit unit = await resolveLibraryUnit(source);
     index.indexUnit(unit);
     return source;
   }
 }
 
 class _CompilationUnitElementMock extends TypedMock
     implements CompilationUnitElement {}