Allow create_system to accept either OS or Netinstall option
Allow create_system to accept either OS or Netinstall option

Now that we have a working network installation system, allow create_system to
specify a netinstall profile. The netinstall object then inherits from an OS
object.

creideiki/palletjack,notCalle/palletjack,notCalle/palletjack,saab-simc-admin/palletjack,creideiki/palletjack,saab-simc-admin/palletjack