Use the new test runner.

test/global/activate/activate_git_after_hosted_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('activating a Git package deactivates the hosted one', () {
     ensureGit();
 
     servePackages((builder) {
       builder.serve("foo", "1.0.0", contents: [
         d.dir("bin", [
           d.file("foo.dart", "main(args) => print('hosted');")
         ])
       ]);
     });
@@ skipping 19 matching lines @@
                 'Loading source assets...\n'
                 'Precompiled foo:foo.\n'
                 'Activated foo 1.0.0 from Git repository "../foo.git".')));
 
     // Should now run the git one.
     var pub = pubRun(global: true, args: ["foo"]);
     pub.stdout.expect("git");
     pub.shouldExit();
   });
 }