slapos_cloud: use getObject to unwrap compute node

master/bt5/slapos_cloud/WorkflowTemplateItem/portal_workflow/person_slap_interface_workflow/script_Person_requestComputeNode.py

@@ -39,7 +39,7 @@ compute_node_list = portal.portal_catalog.portal_catalog(
 if len(compute_node_list) == 2:
   raise NotImplementedError
 elif len(compute_node_list) == 1:
-  compute_node = compute_node_list[0]
+  compute_node = compute_node_list[0].getObject()
   assert compute_node.getFollowUp() == project_list[0].getRelativeUrl()
 else:
 
@@ -56,9 +56,6 @@ else:
   )
   compute_node.approveComputeNodeRegistration()
 
-
-compute_node = context.restrictedTraverse(compute_node.getRelativeUrl())
-
 context.REQUEST.set("compute_node", compute_node.getRelativeUrl())
 context.REQUEST.set("compute_node_url", compute_node.absolute_url())
 context.REQUEST.set("compute_node_reference", compute_node.getReference())