* Add bf16 pool2d and unify bf16 unit tests

* Add change default ops test

test=document_fix

* Add multi_gru_fuse_pass and tests

* fix date

* cleaned up headers

* polish parallel api impl & doc details

* add unittest for coverage

* remove spawn test in py2.7

* add parallel api into white list

* upgrade comment string to raw string

* fix string in

* fix string with ' '

* revert update on comments

* upgrade only necessary

* fix sample code checker

* fix comments with '''

* Add multi_gru_seq_fuse_pass and tests

* fix date

* removed unused functions

* Add bf16 matmul, fc, elementwise add and mul

* Correct unit test

* Add multi_gru op and tests

* removed redundant disable_dygraph()

* add mkldnn inplace op version test

* update mkldnn_inplace fuse pass

* update the inplace test

* add monitoring for executive ut at night

* fix some error for paddle_build.bat

* fix some error

* fix some error in windows

* fix some error on windows

* Add bfloat16 softmax and gelu

* Add pass attr bfloat16_enabled_op_types

* Changes from review

* - Added sum bf16 oneDNN

test=develop

* - Fix to UT of sum bf16

test=develop

* add generate_proposals_v2 op

* 01:Modify the shell script according to the specification

* 01:Modify the shell script according to the specification

* Enhance multiclass_nms to support LoD for dygraph mode

* fix some error in multiclass_nms

* update GetLodFromRoisNum to GetNmsLodFromRoisNum

test=develop

* update dockerfile

* update dockerfile

* update dockerfile

* update dockerfile

* add opencv in ci

* update cidockerfile

* test nccl

* fix diff

* fix dockerfile

* update ubuntu nccl2.7.8

* update ubuntu nccl2.7.8

* add static_mode_white_list

* add Mac CI static list

* add Win CI white_list

* add Coverage and Py3 CI white_list, add test_unittest

* Add zhhsplendid into PE approver, test=develop

* Fix /tab, space mix usage