I updated all nodes to 4.3.3.1, but I did not remove the 4.2 repo from /etc/yum.repos.d.
I did now remove the old repos, ovirt-engine-appliance is now shown as 4.3.
I tried deployment to the hyper converged cluster. First try failed again with "The
target Data Center does not contain the Virtual Disk.". I'm retrying. Should this
fail again, I will try a deployment to the old NFS backed Default Datacenter.