* Create a formal interface for SM Cloudformation test configurations
* Create SageMaker Models with CloudFormation
* Utilize six for adding metaclass to TestConfig
* Update SM backend to return Model objects instead of response objects
* Create SageMaker Notebook Instance Lifecycle Configs with CloudFormation
Implement attributes for SM Notebook Instance Lifecycle Config in CloudFormation
Delete SM Notebook Instance Lifecycle Configs with CloudFormation
Update SM Notebook Instance Lifecycle Configs with CloudFormation
Also fixed error in create_from method where the properties where not
being referenced when setting OnCreate and OnStart.
Factor out template for SM Notebook Lifecycle Config CF tests
* Refactor SM CloudFormation create tests to use pytest.mark.parametrize
* Refactor SM CloudFormation get_attr tests to use pytest.mark.parametrize
Also update the NotebookInstance template function to use Name and Arn
for the output IDs so that the parametrization is easier.
* Refactor SM CloudFormation delete tests to use pytest.mark.parametrize
* Create SageMaker Notebook Instances with CloudFormation
* Implement attributes for SageMaker notebook instance in Cloudformation
* Delete SageMaker Notebook Instances with CloudFormation
* Update SageMaker Notebook Instances with CloudFormation
* Factor out template into function for SageMaker notebook instance tests
