slapos_cloud: increase error verbosity

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

@@ -26,7 +26,7 @@ if (portal.portal_activities.countMessageWithTag(tag) > 0):
 project_list = portal.portal_catalog.portal_catalog(portal_type='Project', reference=project_reference,
                                                     validation_state='validated', limit=2)
 if len(project_list) != 1:
-  raise NotImplementedError
+  raise NotImplementedError("%i projects '%s'" % (len(project_list), project_reference))
 
 compute_node_portal_type = "Compute Node"
 compute_node_list = portal.portal_catalog.portal_catalog(portal_type=compute_node_portal_type, title=compute_node_title, limit=2)