There are several Python scripts in refinery that use dependencies from python3 debian packages. We'd like to move away from using debian packages for this, and instead rely on anaconda-wmf.

To do this, entry python scripts should run using /usr/lib/anaconda-wmf/bin/python3 instead of /usr/bin/env python3.

We'll need to make sure the dependencies we need are in anaconda-wmf, e.g. docopt, tabulate, nose, etc.

This will allow us to remove more debian packages as part of T275786.