Imperative tracer does not hold op any more

refine infer shape in roi align

Rsqrt

Zeros like

Reduce trt ci times.

* scatter_op bug fix, test=develop

* scatter_op bug fix, test=develop

* scatter_op bug fix, test=develop

fix batch_norm and cos_sim shape check 

modified infer shape for op

* test=develop

* test=develop

* test=develop

* test=develop
update API.spec with hash, resolve conflict

* remove unused parameter

Fix merge_lod_tensor_op infer shape

Reduce the layer number of transfromer model

Fix bug: long vgg-utest testing time 

Fix concat shape

Fix sum infershape issue

test=develop

fix split_byref_op infer shape

* - Reuse of conv PD

- conv transpose pd reused

- Added PD reusing of softmax and Batch Norm

- Refactoring and removal of not needed routines of mkl-dnn ops

test=develop

- Fix to reusing conv

test=develop

- Lint fixes

test=develop

- Further lint fixes

test=develop

- Lint  fixes

test=develop

- lint fixes

test=develop

- Lint workaround

test=develop

* - Fix after review on including boost as third party header

test=develop

* - Fix after review. Name change to something more descriptive

test=develop

* optimize lstmp and sample_logits op, test=develop

* update op_use_default_grad_op_maker.spec, test=develop

* delete useless file,test=develop

* append 0 to dim variable to avoid memory reusage, test=develop

test=develop

* test=develop, fix hsigmoid dereference nullptr

* test=develop, refine condition

* test=develop, refine comments

test=develop

test=develop

infer shape compatable -1. test=develop

supprt high rank

test=develop

Fix conv_shift_op infershape

test=develop

test=develop

Fix split

Fix auto growth bug of python dict in dygraph mode

test=develop

add continuous value model op