Use cfg.PortOpt for port option
Use cfg.PortOpt for port option

There is a port option using cfg.IntOpt now, it is
better to replace it with cfg.PortOpt.

Change-Id: Ic01d5ae28e79f0ac617edb27a5afb8a40658a13a

openstack/sahara,tellesnobrega/sahara,egafford/sahara,openstack/sahara,egafford/sahara,tellesnobrega/sahara