[Libvirt-cim] [PATCH 0 of 3] Add support for setting nic target device

[Kaitlin Rupert]

Per the libvirt documentation, users can specify a network interface's target 
device.  If one isn't provided, libvirt will set one automatically.  So this is
optional setting.  Also per the documentation, a target device name cannot
start with 'vnet' or 'vif'.  These values are reserved.

A corresponding test case is also being submitted.