Container driver wrote manifest digest that had a
mismatch with --iidfile output.
When --iidfile was set the --metadata-file was not
written.
Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
This doesn't require pulling in a new direct dependency, we already use
docker/distribution throughout imagetools and build.
Signed-off-by: Justin Chadwell <me@jedevc.com>
Justin Chadwell