Move test_softmax_grad_optimizations inside of T_CrossentropyCategorical1Hot,

add new test test_scale_cost.

Move test_softmax_grad_optimizations inside of T_CrossentropyCategorical1Hot,
383d965b · Pascal Lamblin · 5d367913 · 383d965b
--- a/theano/tensor/tests/test_nnet.py
+++ b/theano/tensor/tests/test_nnet.py