Adds changes to the install-node script to populate the bsn-nova startup
script such that on a nova-compute node:
1. nova-compute service is stopped
2. State of qbr*, qvb*, qvo*, and quantum OVS ports is cleaned
3. The resume_guests_state_on_host_boot set in /etc/nova/nova.conf
4. The nova-compute service is restarted
5. The resume_guests_state_on_host_boot is removed from /etc/nova/nova.conf

This introduces the behavior of VMs automatically starting after a host
reboot (and only after the necessary clean up of persistent devices/ports
is done).