Create a system description.

        :return:

def _set_description(self, node):
        '''
        Create a system description.

        :return:
        '''
        hostname = socket.getfqdn() or platform.node()

        descr = etree.SubElement(node, 'description')
        author = etree.SubElement(descr, 'author')
        author.text = "salt.modules.node on {0}".format(hostname)
        contact = etree.SubElement(descr, 'contact')
        contact.text = 'root@{0}'.format(hostname)
        specs = etree.SubElement(descr, 'specification')
        specs.text = 'Rebuild of {0}, based on Salt inspection.'.format(hostname)

        return descr