test rename overhaul: step 6 - isolate tests

tests/isolate/isolate2_negative_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.
 
 // Dart test program for testing that exceptions in other isolates bring down
 // the program.
 
 #library('Isolate2NegativeTest');
 #import('dart:isolate');
-#import('../../../lib/unittest/unittest.dart');
+#import('../../lib/unittest/unittest.dart');
 
 class Isolate2NegativeTest extends Isolate {
   Isolate2NegativeTest() : super();
 
   void main() {
     throw "foo";
   }
 }
 
 main() {
   test("catch exception from other isolate", () {
     // Calling 'then' ensures the test framework is aware that there is a
     // pending callback, so it can fail quickly.
     new Isolate2NegativeTest().spawn().then(expectAsync1((a) => null));
   });
 }