[VOL-4701] Adding logs if disabling of UNI or POTS port fails while disabling the ONU

Change-Id: Ia06b621dea8550bacc31d30a0d0b39618888b9ee
diff --git a/internal/bbsim/devices/olt.go b/internal/bbsim/devices/olt.go
index 9178491..4d83018 100644
--- a/internal/bbsim/devices/olt.go
+++ b/internal/bbsim/devices/olt.go
@@ -342,6 +342,7 @@
 				oltLogger.WithFields(log.Fields{
 					"oltId": o.ID,
 					"onuId": onu.ID,
+					"OnuSn": onu.Sn(),
 				}).Errorf("Error disabling ONUs on OLT reboot: %v", err)
 			}
 		}