def tearDown(self):
        # cleaning up DB
        self.virtual_tear_down()
        unit_of_work_helper.remove(self.aggregator.logger, self.uow_id)
        # killing the worker
#        self.aggregator.__del__()
        del self.aggregator
 def tearDown(self):
     # cleaning up DB
     unit_of_work_helper.remove(self.aggregator.logger, self.uow_id)
     del self.aggregator