Use the new test runner.

test/run/runs_app_in_directory_in_entrypoint_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:path/path.dart' as path;
 
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 
 main() {
-  initConfig();
   integration('runs a Dart application in the entrypoint package', () {
     d.dir(appPath, [
       d.appPubspec(),
       d.dir("tool", [
         d.file("app.dart", "main() => print('tool');"),
         d.dir("sub", [
           d.file("app.dart", "main() => print('sub');")
         ])
       ])
     ]).create();
 
     var pub = pubRun(args: [path.join("tool", "app")]);
     pub.stdout.expect("tool");
     pub.shouldExit();
 
     pub = pubRun(args: [path.join("tool", "sub", "app")]);
     pub.stdout.expect("sub");
     pub.shouldExit();
   });
 }