Bug Fixes and Other Changes
* Rename package to be 'sagemaker-mxnet-training'. Add automated release to PyPI.
* Add GluonNLP
* Update AWS-MXNet version to 1.6.0 - official release of 1.6
* Update build artifacts
* Misspelling of sagemaker_mxnet_container_*.tar.gz
* Downgrade pip version and unpin awscli
* Revert "Add GluonNLP 0.9 pre-release (116)"
* Add GluonNLP 0.9 pre-release
* update smdebug version to 0.5.0.post0
* update: Constrain package versions in 1.6.0 dockerfiles
* Build context changes based on new requirements
* Update README for 1.6.0 release
* update copyright year in license header
* Change build context for building MX Training Dockerfiles
Testing and Release Infrastructure
* properly fail build if has-matching-changes fails
* properly fail build if has-matching-changes fails