Resets an attribute of an AMI to its default value.

        :type image_id: string
        :param image_id: ID of the AMI for which an attribute will be described

        :type attribute: string
        :param attribute: The attribute to reset

        :rtype: bool
        :return: Whether the operation succeeded or not

def reset_image_attribute(self, image_id, attribute='launchPermission'):
        """
        Resets an attribute of an AMI to its default value.

        :type image_id: string
        :param image_id: ID of the AMI for which an attribute will be described

        :type attribute: string
        :param attribute: The attribute to reset

        :rtype: bool
        :return: Whether the operation succeeded or not
        """
        params = {'ImageId' : image_id,
                  'Attribute' : attribute}
        return self.get_status('ResetImageAttribute', params, verb='POST')