Add missing and new requirements
Enable running some tests as medium in a container

* We start creating docker containers with ubuntu-desktop capabilities
* Enables to rerun the basic CLI tests inside a docker container, unmodified
* Just load on method to run it through the container
* starts and stops the containers centrally, to reset it for each test
  (we will get that in a common framework we'll inherit from later)
* Add to settings some hardcoded values in the tests
* Ensure the contains will have a dbus session running
Add docker image build file