Remove external bridge from Compute nodes
Remove external bridge from Compute nodes

This change modifies overcloud-resource-registry-puppet.yaml to
use net-config-noop.yaml as the default os-net-config template
for compute nodes. The current default of net-config-bridge.yaml
will set up a br-ex on the compute nodes. Since we are not using
DVR that is not needed.

Change-Id: I4e149a4f5a6d19e94e8c0245f52677f92f22d3ec

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