update bug fix #4487

I had this doubt why are we appending auto_increment=## even if SHOW CREATE result is not having AUTO_INCREMENT in it as SHOW CREATE always gives AUTO INCREMENT whenever needed that is whenever we have some value for it. ? I dont think it is needed to append every time. So I have removed it. let me know if it can be an issue in any case.

Signed-off-by: Smita Kumari <kumarismita62@gmail.com>