Add a test that 'rmi' works with truncated image IDs
Add a test that 'rmi' works with truncated image IDs

Add a test to ensure that 'buildah rmi' works if passed a truncated
version of an image's ID.

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

Closes: #361
Approved by: rhatdan

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