Make NeutronEnableDVR parameter consistent
Make NeutronEnableDVR parameter consistent

Change-Id: I4bc74ccfa9bd143b203dd9ad97dacddf56949727
Partial-Bug: 1700664

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