Run flake8 as part of the CI pipeline

[gordonwatts]

Run flake8 (or black) as part of the CI pipeline, and have the pipeline fail if flake8 fails. Most of our repos already do this, so that makes it easy to copy.

As part of this, go through and fix up everything in the source code. In vscode you can add the black extension that will run black on your python files everytime you save them. This will just automate the problem of formatting (black is an opinionated python formatter).

[ArturU043]

Fixed with commit to run black as first needed job.