Sagemaker-training

Bug Fixes and Other Changes

* Remove etc directory

Testing and Release Infrastructure

* Add requirements.txt integration test in dummy container

Deprecations and Removals

* Remove modules.download_and_install

Bug Fixes and Other Changes

* Refactor env
* Refactor entry_point

Documentation Changes

* Update and add docstrings

Testing and Release Infrastructure

* Update GitHub issue and pull request templates

Bug Fixes and Other Changes

* Refactor modules and entry_point (first pass)

Bug Fixes and Other Changes

* Revert "change: stream stderr even when capture_error is True"
* Use shlex.quote to construct bash command
* Relax dependencies version requirements
* Extract module to correct location in download_and_install
* Upgrade psutil

Testing and Release Infrastructure

* Fix cleanup with requirements.txt functional tests
* create __init__.py file for Python 2 import of protobuf during tests (260)
* Mark intermediate_output functional tests as xfail if not run on Linux

Deprecations and Removals

* Remove serving CLI entry point

Bug Fixes and Other Changes

* Pin inotify-simple version

Deprecations and Removals

* Remove legacy serving stack

Features

* Support specifying S3 endpoint URL

Bug Fixes and Other Changes

* Fix memory leak in gethostname and adapt len semantics to Posix