Running unit tests using pytest <args> was broken because pytest was importing

test.settings from Django Evolution instead of from Djblets. This happened

because pytest does not add the current directory to the Python Path, so

depending on the order in which Django Evolution and Djblets were installed and

registered in the Python Path, the wrong test.settings module could be picked

up. To fix this 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 djblets/forms/tests