Merge pull request #320 from fasrc/ajk_note_zeros

Add a PUP note when a zero charge billing record is removed

coldfront/plugins/ifx/calculator.py

@@ -604,6 +604,7 @@ def generate_billing_records_for_allocation_user(self, year, month, user, organi
                 result.append(br)
             else:
                 br.delete()
+                self.update_product_usage_processing(product_usage, resolved=True, message='Zero charge billing record discarded')
                 if self.verbosity > 0:
                     logger.info(f'Charge for {product_usage} was essentially zero and therefore discarded.')
         return result