Add return fix

Author: benle7

sonic_platform_base/redfish_client.py

@@ -1217,6 +1217,10 @@ def redfish_api_trigger_bmc_debug_log_dump(self):
             else:
                 ret = RedfishClient.ERR_CODE_GENERIC_ERROR
                 return (ret, (task_id, f'Error: Return status is {status}'))
+        else:
+            ret = RedfishClient.ERR_CODE_UNEXPECTED_RESPONSE
+            err_msg = "Missing 'error' or 'TaskStatus' field in response"
+            return (ret, (task_id, f'Error: {err_msg}'))
 
     '''
     Get BMC debug log dump file