Add a --pdb option to stestr run #14
Description
Right now if you want to run with pdb stestr breaks that. The way to workaround this is to call subunit.run or testtools.run directly. We point this out in the stestr development docs:
http://stestr.readthedocs.io/en/latest/developer_guidelines.html#running-the-tests
However there is no reason we can't just fast path stestr to call the testr runner directly if we want to use pdb. We probably don't want to store results in the repository in that case.
For an example of this being done, we added this to os-testr: https://github.com/openstack/os-testr/blob/master/os_testr/ostestr.py#L197-L210 we probably could steal that logic and dump it into stestr.commands.run.