* [Feature] Support convert epoch-based schedulers to iter-based.
* Support convert and refactor LR and Momentum to mixin.
* Add unit tests
* fix args and add runner ut
* resolve comments
* tmp
* add scheduler unit test
* disable yapf
* add more test
* add more test
* not use torch test case
* solve comments
* update file
* add more unit tests
* resolve comments
* update cosine ut
* fix typo
* solve comments
* solve comments
* resolve comments