hide all left over kwargs

(cherry picked from commit 2f5a7cc4)

test=release/1.0.0

clean up channel

test=release/1.0.0

(cherry picked from commit 425a8821)

Global Norm need to compulte L2 norm of grads. It will calculate sum{grad^2}. Using float32 is easily overflowed.

test=release/1.0.0

test=release/1.0.0

* hide operator API

* update

* update api.spec

* fix merge

* fix test

only mode

* add nccl2 dist api

* update apispec

* update

* update api spec

* Fix truncated normal.

* Fix.

* wip

* clean up

* should fix running with memopt

* add ut

* mark lr schedule op role

* hide lr_schedule_guard

* use op_role_var instead of ufind

* unify dist test name

* wip for py3 support

* fix var deref

* fix python3 mem_opt order

* remove comments

* Add roi perspective transform.

* Add roi_perspective_transform_op.

* Fix code style.

* Add python api and fix doc.

* Fix API.spec

* Fix python api.

* Fix API.spec

* Move src to detection.

This reverts commit bd79e046, reversing
changes made to 6b4d290c.