Enable unittest of TensorNetwork for gpu
Enable unittest of TensorNetwork for gpu

ysekky/chainer,keisuke-umezawa/chainer,okuta/chainer,cupy/cupy,chainer/chainer,tigerneil/chainer,muupan/chainer,niboshi/chainer,truongdq/chainer,jnishi/chainer,kuwa32/chainer,yanweifu/chainer,tkerola/chainer,wkentaro/chainer,wkentaro/chainer,ktnyt/chainer,niboshi/chainer,kashif/chainer,keisuke-umezawa/chainer,cupy/cupy,Kaisuke5/chainer,okuta/chainer,laysakura/chainer,kikusu/chainer,anaruse/chainer,hvy/chainer,wkentaro/chainer,benob/chainer,1986ks/chainer,woodshop/chainer,masia02/chainer,aonotas/chainer,chainer/chainer,benob/chainer,keisuke-umezawa/chainer,AlpacaDB/chainer,ktnyt/chainer,wkentaro/chainer,okuta/chainer,jnishi/chainer,AlpacaDB/chainer,pfnet/chainer,sinhrks/chainer,ronekko/chainer,rezoo/chainer,minhpqn/chainer,chainer/chainer,ktnyt/chainer,muupan/chainer,niboshi/chainer,woodshop/complex-chainer,sou81821/chainer,delta2323/chainer,kikusu/chainer,hvy/chainer,t-abe/chainer,hidenori-t/chainer,umitanuki/chainer,wavelets/chainer,tscohen/chainer,hvy/chainer,chainer/chainer,t-abe/chainer,keisuke-umezawa/chainer,jnishi/chainer,ktnyt/chainer,kiyukuta/chainer,jnishi/chainer,cupy/cupy,okuta/chainer,niboshi/chainer,hvy/chainer,sinhrks/chainer,ikasumi/chainer,truongdq/chainer,cemoody/chainer,cupy/cupy,ytoyama/yans_chainer_hackathon