undeterministic order of pytest_configure for contest loaded plugins

[RonnyPfannschmidt]

due to pytest intentionally pushing the do_configure step of setting up the pytest_configure hook up,
the complete order of plugins loaded by pytest core, setuptools entryppoints and conftest laoded plugins is random,

this may need actual dependency ordering support in pluggy

[Zac-HD]

Closing this in favor of pytest-dev/pluggy#705.