Use the new test runner.

test/global/run/uses_old_lockfile_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:scheduled_test/scheduled_test.dart';
 
 import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
 
 main() {
-  initConfig();
   integration('uses the 1.6-style lockfile if necessary', () {
     servePackages((builder) {
       builder.serve("bar", "1.0.0");
       builder.serve("foo", "1.0.0", deps: {"bar": "any"}, contents: [
         d.dir("bin", [
           d.file("script.dart", """
               import 'package:bar/bar.dart' as bar;
 
               main(args) => print(bar.main());""")
         ])
@@ skipping 23 matching lines @@
     pub.shouldExit();
 
     d.dir(cachePath, [
       d.dir('global_packages', [
         d.nothing('foo.lock'),
         d.dir('foo', [d.matcherFile('pubspec.lock', contains('1.0.0'))])
       ])
     ]).validate();
   });
 }