'Return VPSA\'s name for server object with given IQN.'

def _get_server_name(self, initiator):

    xml_tree = self.vpsa.send_cmd('list_servers')
    server = self._xml_parse_helper(xml_tree, 'servers', ('iqn', initiator))
    if (server is not None):
        return server.findtext('name')
    return None
