I have just completed a HCI setup with 4.4beta4, thanks Gianluca for you
character by character workaround for step 1 of that wizard, and don't
have the cpu flags problem.

The wizard completed successfully and I now have a working 4.4beta4
engine using glusterfs, :-)
output of lscpu:
CPU family:            6
Model:                 85
Model name:            Intel(R) Xeon(R) Silver 4114 CPU @ 2.20GHz
Stepping:              4

And I used Pass-Through Host CPU for the VM that is acting as the next
level host and thus runs the hosted-engine.

Regards,

Joop