We can't use vm-drivers other than "docker" or "none" in minikube
scripts. It's because there is no device for OSD.
Signed-off-by: Satoru Takeuchi <satoru.takeuchi@gmail.com>
refactor integration tests splitting out the kubernetes
cluster setup to just be in a script and making it the reponsibility
of the host/user/jenkins.
integration tests now run just like unit tests using "go test".