Unify network interface naming
It has been observed, that the names of network interfaces of this image change depending on if it is used in KYPO CRP (from OpenStack) or used locally (from Vagrant Cloud). On non-router ssh accessible nodes, the network interfaces are not set by networking ansible (or the preconfig in case of local sandboxes). On the OpenStack side, the IP and gateway are set automatically. As to the Vagrant Cloud side, I currently do not know. More details will be provided once I take a better look into this issue. It is also very likely, that this affects every image, not just this one.