Remove router set up from the wizard

Remove the ability to set up routers in the wizard. Instead rely on the routing page.

Please check out the screen shots here for an explanation of what needs to change in the front end:
https://docs.google.com/a/praekeltconsulting.com/document/d/1y1JTMqC9FDjFJa4sXjaHUsMFGybIdPiN6TLjep4HfUk/edit
I think we have better validation now. Maybe we should add some tests for it and remove the comment?