Agent installer attempt to contact libvirt in openshift-baremetal-install

In 4.15 when the agent installer is run using the openshift-baremetal-installer binary using an install-config containing platform data, it attempts to contact libvirt to validate the provisioning network interfaces for the bootstrap VM. This should never happen, as the agent installer doesn't use the bootstrap VM.

It is possible that users in the process of converting from baremetal IPI to the agent installer might run into this issue, since they would already be using the openshift-baremetal-installer binary.