执行RF测试只生成output.xml文件，不生成log和report文件

 命令格式：

 -l --log file            HTML log file. Can be disabled by giving a special
                          value `NONE`. Default: log.html
                          Examples: `--log mylog.html`, `-l NONE`
 -r --report file         HTML report file. Can be disabled with `NONE`