ja: siwtching_hub: Reduce the version values of OpenFlow parser
ja: siwtching_hub: Reduce the version values of OpenFlow parser

If the latest version of OpenFlow has been released,
need to append the latest version of OpenFlow to Ryu-book.
So Ryu-book update was a cumbersome.
This patch displays the OpenFlow1.3 parser only.

Signed-off-by: Shinpei Muraoka <154d36ff5308ea67e46435bebcfb51dcc823bd4d@gmail.com>

iwaseyusuke/ryu-book,osrg/ryu-book,osrg/ryu-book,iwaseyusuke/ryu-book