Fixes behavior with empty alert handlers list

src/runners/alert_dispatcher.py

@@ -39,7 +39,8 @@ def main():
         alert = alert_row['ALERT']
         results = []
 
-        for handler in alert.get('HANDLERS') or ['jira']:
+        handlers = alert.get('HANDLERS')
+        for handler in ['jira'] if handlers is None else handlers:
             if handler is None:
                 results.append(None)