Bug fixes and other changes
* add tests to quick canary
* honor 'wait' flag when updating endpoint
* add default framework version warning message in Model classes
* Adding role arn explanation for sagemaker role
* allow predictor to be returned from AutoML.deploy()
* add PR checklist item about unique_name_from_base()
* use unique_name_from_base for multi-algo tuning test
* update copyright year in license header
Documentation changes
* add version requirement for using "requirement.txt" when serving a PyTorch model
* add SageMaker Debugger overview
* clarify requirements.txt usage for Chainer, MXNet, and Scikit-learn
* change "associate" to "create" for OpenID connector
* fix typo and improve clarity on installing packages via "requirements.txt"