Move validation of dependencies to sos model builder
Move validation of dependencies to sos model builder

nismod/smif,willu47/smif,willu47/smif,willu47/smif,tomalrussell/smif,tomalrussell/smif,tomalrussell/smif,willu47/smif,tomalrussell/smif,nismod/smif,nismod/smif,nismod/smif