CLOUDSTACK-6663: Fixed Hyper-V agent fails to start on some setups. During startup agent tries
to get nic info of 0.0.0.0. To get it, it iterates through all nics and return the last NIC in
the list if it doesn't match with any IP address. In case last NIC doesn't have unicastAddress,
Hyper-V agent will fail to start. We don't need IP address during initialization. It get
initialized with startupcommand later.