chore(tests): Make them work

[bkochendorfer]

There were several issues with these tests preventing them from working.

• The parallelism caused port collision despite using a random port
• The run_before section in tox.ini caused several issues in parallel as it was killing the testing harness for other tests while running
• There is a bug in flask-restful which prevents it from correctly parsing args if you do not specify location and are running inside a virtual environment. https://github.com/flask-restful/flask-restful/issues/936
• Moto changed it's testing signature requiring arity of two.
• The psycopg2 manually installed version doesn't seem to work correctly in the tests and there are comments saying as much