Fixes #4741 Right now volumes from expected a dir and not a file so when the drivers tried to do the bind mount, the destination was a dir, not a file so it fails to run. Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael) Upstream-commit: a57900e35f2c30026a070fdfdbdb0ce99b35e1ff Component: engine