Remove Duplicate Rabbit Parameters
Remove Duplicate Rabbit Parameters

This patch removes the duplicate rabbit username and password
parameters.  These parameters cause a conflict when running
merge.py because they already exist in the overcloud template.

Change-Id: I01d386577734c7c516a477e1e402882294ac4376

trozet/opnfv-tht,wyg3958/tripleo-heat-templates,dprince/tripleo-heat-templates,redhat-openstack/tripleo-heat-templates,rdo-management/tripleo-heat-templates,bcrochet/tripleo-heat-templates,rdo-management/tripleo-heat-templates,trozet/tripleo-heat-templates,trozet/opnfv-tht,openstack/tripleo-heat-templates,dprince/tripleo-heat-templates,bcrochet/tripleo-heat-templates,redhat-openstack/tripleo-heat-templates,bcrochet/tripleo-heat-templates,trozet/tripleo-heat-templates,wyg3958/tripleo-heat-templates,openstack/tripleo-heat-templates,trozet/opnfv-tht