fix: nbi_cm replace northbound_cm

crontask/genpmxml.go

@@ -82,7 +82,7 @@ func (t *TaskFunc) GenNFPMXmlFile(neType string) error {
 	var pmResults []NorthboundPm
 	_, err = XormGetNorthboundPm(date, index, neType, &pmResults)
 	if err != nil {
-		log.Error("Failed to get northbound_pm:", err)
+		log.Error("Failed to get nbi_pm:", err)
 		return err
 	}