Make it easier to parse our temporary directory as an image name
Make it easier to parse our temporary directory as an image name

Make it easier to parse our temporary directory's name as an image name,
by making sure that we don't add '.' unnecessarily.

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

Closes: #705
Approved by: rhatdan

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