webadmin,userportal: Unicode support for NIC name

Using I18NNameValidation for supporting
Unicode characters in network interface name.
Affects New/Edit NIC dialog at 'Network Interfaces' sub-tabs
(under VMs/Templates main-tabs).

Change-Id: Ib3f1b1beafdebdd4b05398d9fbbce17fe4a15a93
Bug-Url: https://bugzilla.redhat.com/885373
Signed-off-by: Daniel Erez <derez@redhat.com>