ovirt-hosted-engine-setup requires pyliblzma which is available only for python2. We either need to drop the dependency or find a suitable alternative.
It was used just in 3.6/el6 -> 4.0/el7 upgrade flow: https://github.com/oVirt/ovirt-hosted-engine-setup/blob/ovirt-hosted-engine-setup-2.2/src/plugins/gr-he-upgradeappliance/vm/configurevm.py#L29 which it's not there anymore in 4.3. We can simply drop it.
verified on http://bob-dr.lab.eng.brq.redhat.com/builds/4.4/rhv-4.4.0-29 no pyliblzma dependency on both engine and host
This bugzilla is included in oVirt 4.4.0 release, published on May 20th 2020. Since the problem described in this bug report should be resolved in oVirt 4.4.0 release, it has been closed with a resolution of CURRENT RELEASE. If the solution does not work for you, please open a new bug report.