Infinite recursion with process isolation flag in `setup.cfg`

[edlanglois]

setup.cfg can't be used to run this plugin. Setting the with-process-isolation flag for nosetests in setup.cfg results in infinite recursion as each nose sub-process reads the flag and starts more sub-processes.

[jhakonen]

You can workaround this issue by renaming the setup.cfg file to something else, e.g. tests.cfg and then execute nosetests providing name of the config file:
nosetests -c tests.cfg

It sure would be nice to not to have to do this though.

[dmccombs]

I've played around with this a little, but haven't come up with a good way yet to work around this within the plugin. I'll keep thinking, but I'm not sure when I'll have time to poke at it again - so PRs are welcome. :)