This allows multiple instances of the backend in different containers
to access devices (although generally only one can modify/create them).
Any old metadata is converted on the first run.
Docker-DCO-1.1-Signed-off-by: Alexander Larsson <alexl@redhat.com> (github: alexlarsson)
Upstream-commit: 6d631968fa095734da5e3483c5d7c43fd5b87146
Component: engine