[FLOC-864] Ubuntu sumo package

Ok. This is now ready for a review.

I've re-enabled the rpmlint checks in the fedora functional test, for symmetry with the lintian tests that are in the new ubuntu1404 functional tests.

Unfortunately, lintian isn't available for Fedora, so to run the DEB functional tests, you need to be in an Ubuntu virtual machine. *Not* a docker container, since the functional tests themselves launch the docker based build script....unless docker-in-docker can be made to work, but I haven't explored that.

Fixes https://clusterhq.atlassian.net/browse/FLOC-864
While in some respects this is an improvement on ``flocker.node.testtools.if_docker_configured``, it doesn't handle all cases (boot2docker?), and it duplicates code. I think we should just use the version we already have.