Depending on the order in which Python packages are installed and added to the

Python Path, running unit tests using pytest <args> can be broken due to

pytest picking up the wrong test.settings module. For example instead of

picking up the Reviewboard test settings it could pick up the Django Evolution

or Djblets one. This can be fixed by forcing pytest to consider the current

directory in the Python search path. To do so we update our pytest to the latest

version (any version >7 works) and set pytest's pythonpath config variable to

include the current directory.

Ran ./setup.py develop --all-pyvers to ensure that pytest 7.1.2 was

installed and successfully ran unit tests using pytest reviewboard