Iron out docker tests

[secynic]

Docker tests are experimental, and run via the Travis tests for Python 2.7. What is needed:

• More OS types/versions tested
• Better tests (currently just makes sure that the rules/config are created correctly)
• Re-evaluate how Travis handles the docker tests
• Can I move the Python nosetests/coveralls to docker too?

[secynic]

Writing tests for selinux and apparmor further proves the need to move nosetests/coveralls to different OS containers. I don't see this working with Travis/Ubuntu.

[secynic]

After some dumb filesystem assumptions on my end, I got nosetests/coveralls transferred to docker (dev branch). After docker is finished, the .coverage file is copied back to the Travis host (this is to remove the need for managing Coveralls API token(s)).

I now need to optimize this process, and create different OS tests for each Travis Python version tested, reducing any duplication for the sake of overall test speed.

I also need to configure what tests get run based on the OS tested. This is to get around unique conflicts like AppArmor vs SELinux, where only one will exist.