ok, no issue found during update ovirt-engine-4.1.6.2-0.1.el7.noarch -> 4.1.7.1-0.1.el7.noarch it probably does not make much sense on 4.1 as we can't have empty username|password anymore for fence agents.
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://access.redhat.com/errata/RHEA-2017:3138