Update OpenContrail loadbalancer plugin value
Update OpenContrail loadbalancer plugin value

Update OpenContrail loadbalancer plugin value to match with Newton
changes.

Closes-Bug: #1620657
Change-Id: I48f1884b95e590c0588c52419ec152bd08bc3992

dprince/tripleo-heat-templates,dprince/tripleo-heat-templates,trozet/opnfv-tht,openstack/tripleo-heat-templates,openstack/tripleo-heat-templates,trozet/opnfv-tht,trozet/opnfv-tht