Executes a configuration show-type command.

def _execute_config_show(self, show_command, delay_factor=.1):
        """
        Executes a configuration show-type command.
        """
        rpc_command = '<CLI><Configuration>{show_command}</Configuration></CLI>'.format(
            show_command=escape_xml(show_command)
        )
        response = self._execute_rpc(rpc_command, delay_factor=delay_factor)
        raw_response = response.xpath('.//CLI/Configuration')[0].text
        return raw_response.strip() if raw_response else ''