This adds cluster tests for "kompose up" and "kompose down" for
Kubernetes. At the moment this checks that they are deployable to a
single-node Kubernetes cluster.
More proficient tests such as testing if the pods are actually up will
be added in the future.
You can test this by running: `make test-ci` on your local-machine.
Furthermore, we'll eventually have this enabled on Fabric8 / CentOS CI /
Semaphore (whatever comes first) so we can have a full end-to-end
testing environment.
