Add Docker test runner (#2673)

* Add docker test runner

* Move test Dockerfile into virtualization folder

* Don't build zwave in test environment

script/test_docker

@@ -0,0 +1,5 @@
+#!/bin/bash
+set -e
+
+docker build -t home-assistant-test -f virtualization/Docker/Dockerfile.test .
+docker run --rm -it home-assistant-test tox -e py34