Reorganize tests for samples so the test is discoverable from the sample

samples/swarm/test/swarm_test.dart

 // Copyright (c) 2011, 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 swarm_tests;
 
-import "package:expect/expect.dart";
 import 'dart:html';
 import 'dart:async';
-import '../../../swarm/swarmlib.dart';
-import '../../../swarm/swarm_ui_lib/base/base.dart';
-import '../../../swarm/swarm_ui_lib/view/view.dart';
-import '../../../swarm/swarm_ui_lib/util/utilslib.dart';
-import '../../../../pkg/unittest/lib/unittest.dart';
-import '../../../../pkg/unittest/lib/html_config.dart';
+import 'package:expect/expect.dart';
+import 'package:unittest/html_config.dart';
+import 'package:unittest/unittest.dart';
+import '../swarmlib.dart';
+import '../swarm_ui_lib/base/base.dart';
+import '../swarm_ui_lib/view/view.dart';
+import '../swarm_ui_lib/util/utilslib.dart';
 
 // TODO(jmesserly): these would probably be easier to debug if they were written
 // in the WebKit layout test style, so we could easy compare that the DOM is
 // what we expect it to be after performing some simulated user actions.
 
 void main() {
   useHtmlConfiguration();
   Swarm swarm = new Swarm(useCannedData: true);
   UIStateProxy state = new UIStateProxy(swarm.sections);
   swarm.state = state;
@@ skipping 124 matching lines @@
     void invokeNext() {
       closures[i]();
       i++;
       if (i < length) {
         Timer.run(expectAsync0(invokeNext));
       }
     }
     Timer.run(expectAsync0(invokeNext));
   }
 }