hosted-engine must not require vdsm-gluster and gluster-server since they require a specific channel to be enabled for having them available on RHEL. Add a descriptive text to the setup in order to give information on how to get gluster rpms if not available. Also disable HC support on RHEV-H where no gluster-server is available and no additional channel can be enabled.
Adding a message saying that required packages are missing should be enough to cover this. Note that this is a downstream only change.
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-2016-0375.html