Unify the log of image_classification models, printing the ips

[Xreki]

修改后，输出log如下：

INFO:utils.utility:[Pass 0, train batch 0]  loss 53.09683, acc1 0.00000, acc5 0.00000, lr 0.10000, batch_cost 1.35808 sec, reader_cost 0.00002 sec, ips 94.25099 images/sec
INFO:utils.utility:[Pass 0, train batch 10]   loss 21.68535, acc1 0.00781, acc5 0.00781, lr 0.10000, batch_cost 0.13110 sec, reader_cost 0.00069 sec, ips 976.32917 images/sec
INFO:utils.utility:[Pass 0, train batch 20]   loss 16.28334, acc1 0.00000, acc5 0.00781, lr 0.10000, batch_cost 0.12865 sec, reader_cost 0.00103 sec, ips 994.94165 images/sec
INFO:utils.utility:[Pass 0, train batch 30]   loss 11.11287, acc1 0.00000, acc5 0.00000, lr 0.10000, batch_cost 0.12962 sec, reader_cost 0.00064 sec, ips 987.52497 images/sec