Writes the provisioner's config file to disk and returns None.

        :return: None

def write_config(self):
        """
        Writes the provisioner's config file to disk and returns None.

        :return: None
        """
        template = util.render_template(
            self._get_config_template(), config_options=self.config_options)
        util.write_file(self.config_file, template)