Add a failing test case for an issue where docker is not creating a loopback device if networking is dissabled. Docker-DCO-1.1-Signed-off-by: Timothy Hobbs <timothyhobbs@seznam.cz> (github: https://github.com/timthelion) Upstream-commit: 53c5b1856d91093fed1c2d3f038d227f5fdef4b8 Component: engine