Add an 'ip verify sourceguard' command to specific interfaces.ncm-template

Version 1

    An NCM script to add an 'ip verify sourceguard' command to specific interfaces. The interfaces must: 1) Be 'fastethernet' 2) Be assigned to a given VLAN, specified by the user. Inputs are: 1) Device 2) VLAN whose interfaces should be modified. Use case: the NCM user would want to modify all interfaces on a switch on 'VLAN10'; they would enter '10' for the VLAN, and the script would then find all interfaces on that VLAN and add the command to each.