fix collect-tests tox env

[danabens]

tox -e collect-tests
...
    <Function test_processing_step>
    <Function test_create_model_step>
    <Function test_transform_step>
    <Function test_properties_describe_training_job_response>
    <Function test_properties_describe_processing_job_response>
  <Module test_utils.py>
    <Function test_repack_model_step>
    <Function test_repack_model_step_with_source_dir>

============================================================================================ warnings summary ============================================================================================
.tox/collect-tests/lib/python3.8/site-packages/future/standard_library/__init__.py:65
  /Users/danabens/workplace/github/aws/sagemaker-python-sdk/.tox/collect-tests/lib/python3.8/site-packages/future/standard_library/__init__.py:65: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
    import imp

.tox/collect-tests/lib/python3.8/site-packages/backports/configparser/__init__.py:130
  /Users/danabens/workplace/github/aws/sagemaker-python-sdk/.tox/collect-tests/lib/python3.8/site-packages/backports/configparser/__init__.py:130: DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated since Python 3.3, and in 3.9 it will stop working
    from collections import MutableMapping

.tox/collect-tests/lib/python3.8/site-packages/_yaml/__init__.py:18
  /Users/danabens/workplace/github/aws/sagemaker-python-sdk/.tox/collect-tests/lib/python3.8/site-packages/_yaml/__init__.py:18: DeprecationWarning: The _yaml extension module is now located at yaml._yaml and its location is subject to change.  To use the LibYAML-based parser and emitter, import from `yaml`: `from yaml import CLoader as Loader, CDumper as Dumper`.
    warnings.warn(

-- Docs: https://docs.pytest.org/en/stable/warnings.html
========================================================================================== 3 warnings in 35.17s ==========================================================================================
________________________________________________________________________________________________ summary _________________________________________________________________________________________________
  collect-tests: commands succeeded
  congratulations :)

[sagemaker-bot]

AWS CodeBuild CI Report

• CodeBuild project: sagemaker-python-sdk-local-mode-tests
• Commit ID: d245153
• Result: SUCCEEDED
• Build Logs (available for 30 days)

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[sagemaker-bot]

AWS CodeBuild CI Report

• CodeBuild project: sagemaker-python-sdk-notebook-tests
• Commit ID: d245153
• Result: SUCCEEDED
• Build Logs (available for 30 days)

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[sagemaker-bot]

AWS CodeBuild CI Report

• CodeBuild project: sagemaker-python-sdk-pr
• Commit ID: d245153
• Result: SUCCEEDED
• Build Logs (available for 30 days)

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[sagemaker-bot]

AWS CodeBuild CI Report

• CodeBuild project: sagemaker-python-sdk-unit-tests
• Commit ID: d245153
• Result: SUCCEEDED
• Build Logs (available for 30 days)

Powered by github-codebuild-logs, available on the AWS Serverless Application Repository

[sagemaker-bot]

AWS CodeBuild CI Report

• CodeBuild project: sagemaker-python-sdk-notebook-tests
• Commit ID: fe382bf
• Result: SUCCEEDED
• Build Logs (available for 30 days)

Powered by github-codebuild-logs, available on the AWS Serverless Application Repository

[sagemaker-bot]

AWS CodeBuild CI Report

• CodeBuild project: sagemaker-python-sdk-pr
• Commit ID: fe382bf
• Result: SUCCEEDED
• Build Logs (available for 30 days)

Powered by github-codebuild-logs, available on the AWS Serverless Application Repository

[sagemaker-bot]

AWS CodeBuild CI Report

• CodeBuild project: sagemaker-python-sdk-local-mode-tests
• Commit ID: fe382bf
• Result: SUCCEEDED
• Build Logs (available for 30 days)

Powered by github-codebuild-logs, available on the AWS Serverless Application Repository

[sagemaker-bot]

AWS CodeBuild CI Report

• CodeBuild project: sagemaker-python-sdk-unit-tests
• Commit ID: fe382bf
• Result: SUCCEEDED
• Build Logs (available for 30 days)

Powered by github-codebuild-logs, available on the AWS Serverless Application Repository