For NFV deployments, specific kernel args should be applied and
the nodes should be restarted before running the NetworkDeployment.
It is supported in the heat deployment via PreNetworkConfig. In the
config-download mechanism, ansible steps need to be improved
to handle the reboot and wait for the node.
Change-Id: I43b383ad0e04b8be6c321f8c5b05e628b2520141