Added unit test for edit_vrf function
Added unit test for edit_vrf function

Part of #214

garberg/NIPAP,SpriteLink/NIPAP,ettrig/NIPAP,bbaja42/NIPAP,fredsod/NIPAP,bbaja42/NIPAP,SoundGoof/NIPAP,garberg/NIPAP,bbaja42/NIPAP,bbaja42/NIPAP,SoundGoof/NIPAP,SoundGoof/NIPAP,ettrig/NIPAP,plajjan/NIPAP,bbaja42/NIPAP,garberg/NIPAP,garberg/NIPAP,fredsod/NIPAP,ettrig/NIPAP,plajjan/NIPAP,SpriteLink/NIPAP,ettrig/NIPAP,garberg/NIPAP,ettrig/NIPAP,bbaja42/NIPAP,ettrig/NIPAP,SoundGoof/NIPAP,SpriteLink/NIPAP,fredsod/NIPAP,SoundGoof/NIPAP,fredsod/NIPAP,fredsod/NIPAP,SpriteLink/NIPAP,SpriteLink/NIPAP,SpriteLink/NIPAP,SoundGoof/NIPAP,plajjan/NIPAP,plajjan/NIPAP,fredsod/NIPAP,garberg/NIPAP,plajjan/NIPAP,plajjan/NIPAP