remove scen000 update job from gate as it's non-voting
remove scen000 update job from gate as it's non-voting

Non-voting jobs should not be executed in the gate.

Change-Id: Ib1fa0f08b77f7806e0ece9caf95922256fdaf0de

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