Switch from using docker to podman for testing in .papr
Switch from using docker to podman for testing in .papr

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

Closes: #812
Approved by: giuseppe

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