Tried this... had to make a new user, but "allow" isn't part of the grammar.
Tried optional, but when I did a "hosted-engine --vm-start", the configuration
for the engine reverted back to the original configuration and failed.
I don't think virsh is the proper way to make changes to the ovirt VMs. I tried using
vdsm-client instead, but couldn't figure out the syntax. Any other ideas?