* Revert "accelerate dropout (#9902)"

This reverts commit 2e331c65.

* Correct discard

* Fix print op cpplint errors

* Remove commented code

* accelerate dropout

* accelerate dropout

* "fix the dropout test"

* "rerun ci"

* "fix ci"

* "rerun ci"

* "fix ci"

* "fix"

* "stage"

* disable

* script to add semicolon

* fix typo

* Fix CPPLint errors in multiclass_nms, nccl, nce, reduce and save_load_combine

* Fix

* Add topk Python API.

* Add unit test.

* Remove the repeated API.

* Fix cpplint warnings in beam_search_decode_op

* Fix cpplint warnings in beam_search_op

* Fix test

* fix

* Fix conv_op.h

* Fix conv_mkldnn_op

* Fix cpplint issues in detection_map_op

- EPS added to softmax mkldnn primitive outcome is limited to training
phase

Fixes after review

clang format fixes

clang format fixes