rubygem-asciidoctor is needed by ovirt-log-collector. EPEL package is available: https://dl.fedoraproject.org/pub/epel/7/SRPMS/r/rubygem-asciidoctor-1.5.2-1.el7.src.rpm
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-2017:1823