Introduce the `DockerHubPullSuite` that interacts with its own dedicated
daemon, thus allowing to start from a clean environment and finely test
against the impact of isolated push and pull operations.
Signed-off-by: Arnaud Porterie <arnaud.porterie@docker.com>
Upstream-commit: 9e4addde76f4aea4613f09215084812b6a357521
Component: engine