Drop the role service override for ovb
Drop the role service override for ovb

We should be using the shipped roles and not overriding these services
as it leads to OVB not reflecting the actual deployment and we have to
manage this when we need to add new default services.

Change-Id: I992056a497e16576ab5710f9cbbc8a599d822222

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