With the new validation webhooks we can validate the credentials on "Selected migration network" before persisting it.

Original bug:

Description of problem:
from MTV UI under > providers > VMware > Hosts > Select migration network

providing wrong credentials on "Select migration network"- the failed network become the current, instead of the previous active network

scenario :
the active network was the "mgmt", after trying to change the network to "vmk1" network with wrong credentials, the failed network become the current network instead of the active one which is the "mgmt"

https://bugzilla.redhat.com/show_bug.cgi?id=1958834