slapos_pdm: no need to check all rejected decisions

master/bt5/slapos_pdm/SkinTemplateItem/portal_skins/slapos_pdm/InstanceTree_createUpgradeDecision.py

@@ -79,13 +79,13 @@ if len(allocation_cell_list) == 1:
     if compute_node is not None:
       assert compute_node.getRelativeUrl() in allocation_cell_list[0].getParentValue().getParentValue().getAggregateList()
 
-    for previous_upgrade_decision in portal.portal_catalog(
+    if portal.portal_catalog.getResultValue(
       portal_type='Upgrade Decision',
       aggregate__uid=instance_tree.getUid(),
-      simulation_state=['rejected']
+      simulation_state=['rejected'],
+      software_release__uid=allocation_cell_list[0].getSoftwareReleaseUid()
     ):
       # If same upgrade decision has been rejected, do nothing
-      if previous_upgrade_decision.getSoftwareReleaseValue().getUrlString() == allocation_cell_list[0].getSoftwareReleaseValue().getUrlString():
       return
 
     decision_title = 'A new upgrade is available for %s' % instance_tree.getTitle()