This makes it possible to choose the graphdriver and the execdriver which is going to be used for the cli integration tests. Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack) Upstream-commit: 62b08f557db91cc5cd12ea9ceb0a4d8cf3d6e0f1 Component: engine