slapos_pdm: do not put newly create decision in started

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master/bt5/slapos_pdm/WorkflowTemplateItem/portal_workflow/upgrade_slap_interface_workflow/script_UpgradeDecision_approveRegistration.py

@@ -16,7 +16,7 @@ with upgrade_decision.defaultActivateParameterDict(activate_kw):
 
   upgrade_decision.setStartDate(DateTime())
   if upgrade_decision.getSimulationState() == "planned":
-    upgrade_decision.start()
+    upgrade_decision.confirm()
 
 # Prevent concurrent transaction to create 2 upgrade decision for the same instance_tree
 instance_tree.serialize()