Enable analysis driver in tests where possible

pkg/analysis_server/test/domain_execution_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 'package:analysis_server/protocol/protocol.dart';
 import 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_server/src/domain_execution.dart';
 import 'package:analysis_server/src/plugin/server_plugin.dart';
@@ skipping 184 matching lines @@
     });
   });
 }
 
 @reflectiveTest
 class ExecutionDomainTest extends AbstractAnalysisTest {
   String contextId;
 
   @override
   void setUp() {
+    enableNewAnalysisDriver = true;
     super.setUp();
     createProject();
     handler = new ExecutionDomainHandler(server);
     _createExecutionContext(testFile);
   }
 
   @override
   void tearDown() {
     _disposeExecutionContext();
     super.tearDown();
@@ skipping 56 matching lines @@
  * A [Source] that knows it's [fullName].
  */
 class TestSource implements Source {
   String fullName;
 
   TestSource(this.fullName);
 
   @override
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
 }