Ubuntu Jeos network interface missing after move, clone or convert.

JeOS uses discovery to find the network interfaces. When found they are written to the file /etc/udev/rules.d/70-persistent-net.rule while this generally works well it causes problems when a vm is moved. In order to have the operating system re-find the network interface cards (nic's) remove the lines in this file.

ex.
# PCI device 0x1022:0x2000 (pcnet32)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:AA:BB:CC:DD:EE", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"