fix parallel error for 1.7 (#4243)

* fix parallel error for 1.7

* remove modification to run.sh

dygraph/lac/run.sh

@@ -4,7 +4,7 @@ export FLAGS_eager_delete_tensor_gb=0.0
 export FLAGS_fast_eager_deletion_mode=1
 export CUDA_VISIBLE_DEVICES=0,1,2,3
 
-python -m paddle.distributed.launch --selected_gpus=0,1,2,3 train.py \
+python -m paddle.distributed.launch  --selected_gpus=0,1,2,3 train.py \
         --train_data ./data/train.tsv \
         --test_data ./data/test.tsv \
         --model_save_dir ./padding_models \

dygraph/lac/sequence_labeling.py

@@ -330,7 +330,7 @@ class lex_net(fluid.dygraph.Layer):
         
         self.linear_chain_crf = Linear_chain_crf(
                 param_attr=fluid.ParamAttr(
-                    name='crfw', learning_rate=self.crf_lr),
+                    name='linear_chain_crfw', learning_rate=self.crf_lr),
                 size=self.num_labels)
 
         self.crf_decoding = Crf_decoding(