* Run some tests with the latest development versions of Docker SDK for Python, requests, and urllib3.
* Use LooseVersion instead of StrictVersion to parse urllib3 versions.
* Rename setup role.
* Create new CI group 6, and move docker_compose v1 tests into there.
* Split up Docker setup in integration tests.
* Change setup_docker_compose_v1 to install its own Docker SDK for Python.
* Docker SDK for Python not needed to set up registry or query host info.