ansible: Handle case where iface is down
ansible: Handle case where iface is down

If an interface is down, trying to read the 'ipv4' property will
faily miserably and end all the things. This fixes that by returning
an empty dictionary in that case.

EasternEdgeRobotics/2016,EasternEdgeRobotics/2016,EasternEdgeRobotics/2016,EasternEdgeRobotics/2016