Added drop_last to DeepSpeedDataLoader (#1321)
* Added drop_last to DeepSpeedDataLoader
This solves issue #326
* Updated drop_last in engine.py
added drop_last as a ds_config as mentioned by @tjruwase
* Update engine.py
* Update engine.py
* updated config.py and constants.py
* Update constants.py
* added dataloader_ prefix
* Update dataloader.py
* corrected yapf test errors
* Update test_data.py
Added dataloader_drop_last unit test
* Corrected yapf and formatting issues
* updated simple_model.py and test_data.py
* Update simple_model.py
* pre-commit fix
* corrected issues
* Update test_data.py
* Update test_data.py
* Update test_data.py
* Update test_data.py
* removed batch_size from test_data.py
* Update simple_model.py
* Update test_data.py
* Update test_data.py
* Fix unit test issues
* Use fp32 to make things work
Co-authored-by: Olatunji Ruwase <olruwase@microsoft.com>
Co-authored-by: Jeff Rasley <jerasley@microsoft.com>
