Imperative test layers without parameters

Revert "Model data cryption link all lib"

test_analyzer_int8 tests use default pass order

test=develop

test=develop

add NCCLParallelContext for parallel dygraph

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test=develop

* add pixel_shuffle op

* add pixel_shuffle op, test=develop

* rewrite code, test=develop

* delete useless comment, test=develop

* Refine pixel_shuffle_op and unit testing

* refine code,test=develop

* refine .cu,test=develop

* fix unittest,test=develop

* Fix unit testing
test=develop

* resolve conflict, test=develop

* fix test, test=develop

* fix API, test=develop

* fix test datatype bug,test=develop

* polish comments,test=develop

* add API,test=develop

* test=develop

* Add Pixel_Shuffle OP,test=develop

* support python3,test=develop

* add include memory to travis CI bug,test=develop

test=develop, fix transformer in dygraph

test=develop

fix load bug about context.place

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This reverts commit c38c7c56.

* Fix bug of gradient interface

* shrink transformer

* Right transformer

* Change from width-first backward to deep-first backward process

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* Reverse iterator op's input

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* Polish code

* Change the iteration direction in ingrads' map slots

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* Polish code

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* Add GPU place in static mode of ptb rnn

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* Polish code

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/

add some dygraph op
1.Conv3d
2.Conv3dTranspose
3.RowConv
4.GroupNorm
5.SpectralNorm
6.TreeConv

and utest

add a simple test

* fix some grad op desc maker
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* fix grad op desc makers
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fix fluid.metrics.Precision bug

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merge to local

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* expose fuse broadcast ops

* Fix the bug of the fast threaded executor. I

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* fix preprocess script with processbar, integrity check and logs
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* delete unnecessary empty lines, change function name
test=develop