Terminate the instances specified

        :type instance_ids: list
        :param instance_ids: A list of strings of the Instance IDs to terminate

        :rtype: list
        :return: A list of the instances terminated

def terminate_instances(self, instance_ids=None):
        """
        Terminate the instances specified

        :type instance_ids: list
        :param instance_ids: A list of strings of the Instance IDs to terminate

        :rtype: list
        :return: A list of the instances terminated
        """
        params = {}
        if instance_ids:
            self.build_list_params(params, instance_ids, 'InstanceId')
        return self.get_list('TerminateInstances', params,
                             [('item', Instance)], verb='POST')