update CheckFile function in data_feed for ignore the space at the end of each line of data(for example, it may be added '\t' character to the end of the reduce task output when processes data by hadoop, which does not affect the correctness of the data). test=develop
update CheckFile function in data_feed for ignore the space at the end of each line of data(for example, it may be added '\t' character to the end of the reduce task output when processes data by hadoop, which does not affect the correctness of the data). test=develop

luotao1/Paddle,luotao1/Paddle,tensor-tang/Paddle,PaddlePaddle/Paddle,tensor-tang/Paddle,tensor-tang/Paddle,baidu/Paddle,tensor-tang/Paddle,PaddlePaddle/Paddle,chengduoZH/Paddle,baidu/Paddle,chengduoZH/Paddle,baidu/Paddle,chengduoZH/Paddle,luotao1/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,baidu/Paddle,luotao1/Paddle,chengduoZH/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,baidu/Paddle,tensor-tang/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,PaddlePaddle/Paddle,chengduoZH/Paddle,PaddlePaddle/Paddle