bugfix/add-six-to-deps

[evamaxfield]

Pull request recommendations:

• [x] Name your pull request your-development-type/short-description. Ex: feature/read-tiff-files
• [x] Link to any relevant issue in the PR description. Ex: Resolves [gh-12], adds tiff file format support
• [x] Provide context of changes.

Tried to kick off pipeline run and got some errors with the latest google API where six had a missing module.

See https://github.com/googleapis/python-bigquery/issues/70 for more details.

Additionally to fix all the build failures had to format some of the files and version a lot of the google APIs

• [x] Provide relevant tests for your feature or bug fix.
• [x] Provide or update documentation for any feature added by your pull request.

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