build-sys: Avoid self-dependency in setup.py
build-sys: Avoid self-dependency in setup.py

The earlier 58a6e0e4eff379578d497d67002cbef1438f8ab2 and later
455fc8499fee1b970eafd7f80942405ef6bef17f both break if the atomic
package is not actually installed on the system - as will be the case
with `mock/pbuilder` style builds.

It looks like OpenStack uses https://pypi.python.org/pypi/pbr which
presumably solves this problem.  I however am not super interested
right now in diving into that...I just want the thing to build.

Ansible just inserts the current dir in `sys.path`, which seems like a
simple hack, so let's do that.

dustymabe/atomic,praiskup/atomic,cdrage/atomic,cdrage/atomic,ibotty/atomic,dustymabe/atomic,rh-atomic-bot/atomic,lsm5/atomic,charliedrage/atomic,lsm5/atomic,aveshagarwal/atomic,rh-atomic-bot/atomic,sallyom/atomic,sallyom/atomic,ibotty/atomic,aveshagarwal/atomic,praiskup/atomic,charliedrage/atomic