Description of problem: No output of the actual failure (as rpm-python is usually insntalled) but even if rpm-python is not present, the upgrade goes on until it fails. Bump into this while reading the code.
unable to reproduce : openstack-tripleo-heat-templates-5.0.0-1.2.el7ost.noarch
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHEA-2016-2948.html