Add scenario002-standalone to gates as we make it voting
Add scenario002-standalone to gates as we make it voting

Adds scen2 to the gate jobs as well as check.

Change-Id: Ida84c67ba6426c0498fcc99c39a0857a772728a4

dprince/tripleo-heat-templates,dprince/tripleo-heat-templates,openstack/tripleo-heat-templates,openstack/tripleo-heat-templates