Upstream for keycloak-httpd-client-install has released a new version with important fixes. I believe OSP is pulling from Fedora master (e.g. rawhide). The new version of keycloak-httpd-client-install is available there.
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-2016-1597.html