Changes to properly deal with "floating IP"-like addresses (i.e., addresses
assigned by the cloud to a VM, but not known by the VM itself). With the
introduction of the "cloud_pip" attribute (in addition of the already
existing "cloud_ip" attribute), VMs that are part of a VApp (AI) can find and
contact each other through the internal network. The "floating IP"
(whenever used, since it is an optional parameter) will be used by CB
Orchestration Node to contact the VMs during the initial deployment (the
"cloud_ip" attribute), but the VMs will know (and use) their internal IP
addresses.