copy.bats: check ownerships in the container
copy.bats: check ownerships in the container

When testing the --chown flag, expect ownership of content that we copy
in while specifying an owner to match the IDs of that owner as the
container knows them.

Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>

Closes: #700
Approved by: rhatdan

rhatdan/buildah,TomSweeneyRedHat/buildah,projectatomic/buildah,ipbabble/buildah,projectatomic/buildah,nalind/buildah,nalind/buildah-1,projectatomic/buildah,nalind/buildah,nalind/buildah-1,rhatdan/buildah,rhatdan/buildah,TomSweeneyRedHat/buildah,TomSweeneyRedHat/buildah,nalind/buildah-1,ipbabble/buildah