test rename overhaul: step 6 - isolate tests

tests/isolate/cross_isolate_message_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 isolates can communicate to isolates
 // other than the main isolate.
 
 #library('CrossIsolateMessageTest');
 #import('dart:isolate');
-#import('../../../lib/unittest/unittest.dart');
+#import('../../lib/unittest/unittest.dart');
 
 class CrossIsolate1 extends Isolate {
   CrossIsolate1() : super.heavy();
 
   void main() {
     this.port.receive((msg, replyTo) {
       SendPort otherIsolate = msg;
       ReceivePort receivePort = new ReceivePort();
       receivePort.receive((msg, replyTo) {
         otherIsolate.send(msg + 58, null);  // 100.
@@ skipping 40 matching lines @@
               Expect.equals(499, msg);
               myPort.close();
             }));
             msg[1].send(42, null);
           }));
         }));
       }));
     }));
   });
 }