lxc-test-usernic: update to reflect new lxc-test-usernic arguments
lxc-test-usernic: update to reflect new lxc-test-usernic arguments

the new lxcpath and lxcname are not optional

Signed-off-by: Serge Hallyn <3df611b026e4639bee8aef7a4beb2e39fcebb313@ubuntu.com>

akshaykarle/lxc,GreatFruitOmsk/lxc,federicobriata/lxc,thmo/lxc,tych0/lxc,LynxChaus/lxc,akshaykarle/lxc,bostjan/lxc,ysbnim/lxc,ysbnim/lxc,hfuCN/lxc,caglar10ur/lxc,federicobriata/lxc,terceiro/lxc,tych0/lxc,hfuCN/lxc,hfuCN/lxc,thmo/lxc,thmo/lxc,aeris/lxc,cjwatson/lxc,GreatFruitOmsk/lxc,terceiro/lxc,aeris/lxc,tych0/lxc,hallyn/lxc,ss1h2a3tw/lxc,LynxChaus/lxc,terceiro/lxc,ss1h2a3tw/lxc,federicobriata/lxc,ss1h2a3tw/lxc,QingweiPeterLan/cs188-lxc,QingweiPeterLan/cs188-lxc,caglar10ur/lxc,cjwatson/lxc,hallyn/lxc,GreatFruitOmsk/lxc,bostjan/lxc,cjwatson/lxc,ysbnim/lxc,LynxChaus/lxc,aeris/lxc,hallyn/lxc,akshaykarle/lxc,bostjan/lxc,caglar10ur/lxc,QingweiPeterLan/cs188-lxc