Bump up a sleep wait time, to hopefully fix things on panda. (Long term we need to wait on a callback, but until that is in place we just have to sleep)

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@23066 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/action/ActionTrackingServiceImplTest.java

@@ -1031,7 +1031,7 @@ public class ActionTrackingServiceImplTest extends TestCase
        // End the transaction. Should allow the async action
        //  to be executed
        txn.commit();
-       Thread.sleep(250);
+       Thread.sleep(450);
        txn = transactionService.getUserTransaction();
        txn.begin();