update_printer: stop yelling you son of a cron

printer/models.py

@@ -24,13 +24,15 @@ class Printer(models.Model):
             self.save()
 
     def update_printer_information(self):
+        try:
             for paper_tray in self.paper_trays.all():
                 paper_tray.update_from_snmp()
             for supply in self.supplies.all():
                 supply.update_from_snmp()
             self.refresh_alerts() # Since the number of alert is changing we refresh instead of update
             self.update_from_snmp()
-
+        except SNMPException(err):
+            print err
     def refresh_paper_trays(self):
         for paper_tray in self.paper_trays.all():
             paper_tray.delete()