[test] lr_find with bs_scale (#6422)
[test] lr_find with bs_scale (#6422)

* init test: test_lr_find_with_bs_scale

* Update test_lr_finder.py

* remove gpu req

* try boring model

* custom boring model

* pep8

* fix typo

* Update test_lr_finder.py

* typo

* typo
williamFalcon/pytorch-lightning,williamFalcon/pytorch-lightning