modify cb_param.loss for callback

tutorials/source_en/advanced_use/customized_debugging_information.md

@@ -108,7 +108,7 @@ class StopAtTime(Callback):
         cb_params = run_context.original_args()
         epoch_num = cb_params.cur_epoch_num
         step_num = cb_params.cur_step_num
-        loss = cb_params.cb_params
+        loss = cb_params.net_outputs
 	cur_time = time.time()
 	if (cur_time - cb_params.init_time) > self.run_time:
             print("epoch: ", epoch_num, " step: ", step_num, " loss: ", loss)

tutorials/source_zh_cn/advanced_use/customized_debugging_information.md

@@ -107,7 +107,7 @@ class StopAtTime(Callback):
         cb_params = run_context.original_args()
         epoch_num = cb_params.cur_epoch_num
         step_num = cb_params.cur_step_num
-        loss = cb_params.cb_params
+        loss = cb_params.net_outputs
 	cur_time = time.time()
 	if (cur_time - cb_params.init_time) > self.run_time:
             print("epoch: ", epoch_num, " step: ", step_num, " loss: ", loss)