slapgrid: fix reporting of destroyed instances

slapos/grid/slapgrid.py

@@ -1496,7 +1496,7 @@ stderr_logfile_backups=1
             self.slap.jio_api_connector.put({
               "portal_type": "Software Instance",
               "reference": computer_partition.get("reference"),
-              "reported_state": "stopped"
+              "reported_state": "destroyed"
             })
           else:
             computer_partition["slap_partition"].stopped()