[core] Ensure early reparenting of generated roles

Author: teo

core/workflow/aggregatorrole.go

@@ -117,6 +117,7 @@ func (r *aggregatorRole) ProcessTemplates(workflowRepo *repos.Repo) (err error)
 	r.resolveOutboundChannelTargets()
 
 	for _, role := range r.Roles {
+		role.setParent(r)
 		err = role.ProcessTemplates(workflowRepo)
 		if err != nil {
 			return

core/workflow/iteratorrole.go

@@ -178,6 +178,9 @@ func (i *iteratorRole) expandTemplate() (err error) {
 	}
 
 	i.Roles = roles
+	for j := 0; j < len(i.Roles); j++ {
+		i.Roles[j].setParent(i.GetParent())
+	}
 	return
 }