[SMN][SDK]: Please fix "delete_topic_attribute" function

[daniel-kovac]

Please fix "delete_topic_attribute" as it is currently not working. With current implementation:

def delete_topic_attribute(self, topic, name=None):
        """Delete all attributes of a topic

        :param topic: Either the ID of a topic or a
            :class:`~otcextensions.sdk.smn.v2.topic.Topic`
            instance.
        :param name: Attribute Name.
        :returns: request_id.
        :rtype: :class:`~otcextensions.sdk.smn.v2.topic.TopicAttribute`
        :raises: :class:`~openstack.exceptions.ResourceNotFound`
            when no resource can be found.
        """
        topic = self._get_resource(_topic.Topic, topic)
        if name:
            **return self._delete(_topic.TopicAttribute,
                                id=name, topic_id=topic.id)**
        return self._delete(_topic.TopicAttribute,
                            topic_id=topic.id, requires_id=False)

When passing argument name (currently only possible is "access_policy") I am getting error :

return self._delete(_topic.TopicAttribute,", "TypeError: Proxy._delete() missing 1 required positional argument: 'value'"], "stdout": "", "stdout_lines": []}

I believe problem is how return.self is defined and specifically : it passes id=name instead of positional value.