Fix tests to use _ for unused varible
Fix tests to use _ for unused varible

Closes-Bug: #1446411
Change-Id: Ia9796bfa87f3273f615baeabcc50cc87914fb7d0

ramineni/my_congress,openstack/congress,ekcs/congress,ekcs/congress,ramineni/my_congress,ramineni/my_congress,ekcs/congress,openstack/congress,ekcs/congress,ramineni/my_congress