Add test for remove_split option of builder_graph
Add test for remove_split option of builder_graph

hvy/chainer,ktnyt/chainer,keisuke-umezawa/chainer,pfnet/chainer,truongdq/chainer,keisuke-umezawa/chainer,anaruse/chainer,kashif/chainer,rezoo/chainer,kuwa32/chainer,minhpqn/chainer,truongdq/chainer,keisuke-umezawa/chainer,hidenori-t/chainer,niboshi/chainer,chainer/chainer,bayerj/chainer,niboshi/chainer,tscohen/chainer,hvy/chainer,wkentaro/chainer,ikasumi/chainer,jnishi/chainer,tigerneil/chainer,benob/chainer,cemoody/chainer,cupy/cupy,elviswf/chainer,muupan/chainer,yanweifu/chainer,1986ks/chainer,AlpacaDB/chainer,chainer/chainer,jfsantos/chainer,ktnyt/chainer,sinhrks/chainer,woodshop/complex-chainer,keisuke-umezawa/chainer,cupy/cupy,tereka114/chainer,jnishi/chainer,ysekky/chainer,ronekko/chainer,okuta/chainer,wkentaro/chainer,jnishi/chainer,hvy/chainer,woodshop/chainer,AlpacaDB/chainer,sinhrks/chainer,kikusu/chainer,tkerola/chainer,wkentaro/chainer,wkentaro/chainer,ktnyt/chainer,okuta/chainer,cupy/cupy,delta2323/chainer,Kaisuke5/chainer,wavelets/chainer,kiyukuta/chainer,muupan/chainer,jnishi/chainer,kikusu/chainer,niboshi/chainer,okuta/chainer,ktnyt/chainer,t-abe/chainer,chainer/chainer,umitanuki/chainer,aonotas/chainer,t-abe/chainer,chainer/chainer,okuta/chainer,niboshi/chainer,sou81821/chainer,laysakura/chainer,ytoyama/yans_chainer_hackathon,masia02/chainer,benob/chainer,hvy/chainer,cupy/cupy