Fix the bug in route add
Fix the bug in route add

Fix the route add method to set the proper DTO fields.

Signed-off-by: Ryu Ishimoto <079ed83f2117612507014e8df63a80b706c7096b@midokura.com>

midokura/python-midonetclient,midonet/python-midonetclient,midokura/python-midonetclient,midonet/python-midonetclient