Enforce Python code standards with black and flake8

[shanemcd]

Code standards are important, but I hate spending any amount of time actually thinking about it. So, let's automate that activity out of our lives.

[thenets]

@shanemcd I believe that we need to talk about this before enforcing a code style. The black library is not even configured to follow the tox asserts.

For Go it's easy because the go fmt does the job. For Python, not so much. Libraries like black and tox do not follow the same defaults.

I decided to disable at least the receptorctl-lint until we fix these issues and decide on one specific code style here:

• Add test work cancel and work release #468

[shanemcd]

@thenets We already use black in AWX, and we had a team discussion around its use when it was adopted. I'm not sure what you mean by "not even configured to follow the tox asserts."

[thenets]

Already solved while talking to @shanemcd, but to give context to other people:

My mistake about the libraries' names. The issue was about black and flake8.
The current problem is about the line length. By default, black doesn't follow the same size as flake8, but even passing this size as a param, the comments don't have any formating process, which will fail during the lint step.

The current solution needs some manual changes in some cases. We can search later about a better way to run black automatically.