I am not sure if the message reached the list so I will write it again. 
Thank you for your help!
Please note:
- eno1 is a 1Gb connection and was the one used when oVirt was 
installed.  It is currently the only interface actually connected to 
anything.
It seems like the 
'eno1' is part of the 'ovirtmgmt' according to the report from vdsm. But
 it seems out of sync with engine expectations. 
Can you try what Miguel has suggested: 
"You can configure the new nic through the UI, by clicking through
'Compute' > "Hosts" > (select the host in question) > "Network
Interfaces" > "Setup Host Networks".
There you can attach the desired network to the desired nic."
But before confirmation uncheck "Verify
 connectivity between Host and Engine". This is needed if you want to 
move management network as the vdsm is guaranteed to lose connection for
 a brief moment. 
 
Hopefully it helps.