If user set create_tap to True then specify an interface (tap_gateway_interface) to use as gateway for
guest vm connected to tap interface, slapformat will configure route
to reache each guest from host: "route add -host tap_ip dev slaptapXX",
where tap_ip belong to the same network as the ip on tap_gateway_interface.
slapformat will also create network information for each tap
who will be used to configure network in guest vm.

This is a begining to create cluster of vm which are connected to
each other using tap interface, without bridge.