* Modify VM context generation.
* Modify attach/detach nic functionality.
* Modify CLI nic-attach, so an alias can be attached.
Co-authored-by: Alejandro Huertas <ahuertas@opennebula.systems>
logic in oned to delay NIC/context resolution till deployment time. Also
scheduler has been extended to use the match-making algorithm to networks.
Sunstone interface changes to select auto networks.