Put Pytest fixtures inside of pytest.ini

[nh916]

Description

currently all pytest fixtures are within the fixtures/ folder and imported into the conftest.py. It might be cleaner if we utilize pytest.ini or some kind of pytest configuration file to tell pytest where all of the pytest fixtures are located so we don't have to import it into conftest.py

[nh916]

I think this got the job done for now, but open to improvements if it comes along

#219