Default in puppet-neutron is 'RegionOne', so let's override it with the
right parameter in TripleO.
Change-Id: I3f1693b91178027c8e05288aeba72b7d6bd042be
nova::purge_config: {get_param: EnableConfigPurge}
nova::network::neutron::neutron_project_name: 'service'
nova::network::neutron::neutron_username: 'neutron'
+ nova::network::neutron::neutron_region_name: {get_param: KeystoneRegion}
nova::network::neutron::dhcp_domain: ''
nova::network::neutron::neutron_password: {get_param: NeutronPassword}
nova::network::neutron::neutron_url: {get_param: [EndpointMap, NeutronInternal, uri]}