Add test that covers creating a Jobgraph for an initialised sosmodel
Add test that covers creating a Jobgraph for an initialised sosmodel

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