Make integration tests a bit cleaner.

utils/tests/pub/install/git/unlock_if_incompatible_test.dart

 // Copyright (c) 2012, 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.
 
 library pub_tests;
 
 import 'dart:io';
 
 import '../../test_pub.dart';
-import '../../../../../pkg/unittest/lib/unittest.dart';
 
 main() {
-  test('updates a locked Git package with a new incompatible constraint', () {
+  integration('updates a locked Git package with a new incompatible '
+      'constraint', () {
     ensureGit();
 
     git('foo.git', [
       libDir('foo'),
       libPubspec('foo', '0.5.0')
     ]).scheduleCreate();
 
     appDir([{"git": "../foo.git"}]).scheduleCreate();
 
     schedulePub(args: ['install'],
@@ skipping 13 matching lines @@
     appDir([{"git": "../foo.git", "version": ">=1.0.0"}]).scheduleCreate();
 
     schedulePub(args: ['install'],
         output: new RegExp(r"Dependencies installed!$"));
 
     dir(packagesPath, [
       dir('foo', [
         file('foo.dart', 'main() => "foo 1.0.0";')
       ])
     ]).scheduleValidate();
-
-    run();
   });
 }