Merge pull request #621 from PaddlePaddle/wangjiawei04-patch-2

Update senta get_data.sh

python/examples/senta/get_data.sh

 wget https://paddle-serving.bj.bcebos.com/paddle_hub_models/text/SentimentAnalysis/senta_bilstm.tar.gz --no-check-certificate
 tar -xzvf senta_bilstm.tar.gz
 wget https://paddle-serving.bj.bcebos.com/paddle_hub_models/text/LexicalAnalysis/lac.tar.gz --no-check-certificate
-tar -xzvf lac_model.tar.gz
+tar -xzvf lac.tar.gz
 wget https://paddle-serving.bj.bcebos.com/reader/lac/lac_dict.tar.gz  --no-check-certificate
 tar -xzvf lac_dict.tar.gz
 wget https://paddle-serving.bj.bcebos.com/reader/senta/vocab.txt --no-check-certificate