GitLab

* Add Linear warmup+decay lr schedule
Update lr schedule unit tests

* LR scheduler unit tests for LR Range Test and 1Cycle

* Disable yapf to preserve parameterizaton

* Disable test_pipe.py for CI debugging

* Disable test_lr_scheduler for CI debugging

* Disable test_lr_scheduler for CI debugging

* Enable all unit tests for CI debugging
Co-authored-by: Jeff Rasley <jerasley@microsoft.com>

Update lr schedule unit tests

* add fix and tests for get_lr from lr_scheduler before training starts