* add is_test to pooling and activations
add prop_kind support for layers activation. conv and pooling
add a pass that sets is_test to true
add transpiler version of is_test pass
test=develop
* patch test and pass
test=develop
* add pass to analyzer.h
test=develop
* add is_test attr description & pass only on mkldnn
in:
activation_op.cc
batch_norm_op.cc
conv_op.cc
dropout_op.cc
lrn_op.cc
pool_op.cc
sequence_pool_op.cc
softmax_op.cc
* fix is_test handling for activation pool and conv
* change description of is_test for all layers again
* remove GetAttr(use_mkldnn) from pass
* rename correct_mkldnn_test_phase to is_test
and remove dependency on MKLDNN
test=develop
* review fix magic number
* two if(..)s into one
* Check is_test once and pass mkldnn forward prop kind
* dereference shared_ptr with * (without get())
test=develop
* add is_test_pass back
test=develop