Adding roles for neuton server

Change-Id: I137a0d33d8635c2f38fe55a36f436c9f937f4769
diff --git a/neutron/control/openvswitch/single.yml b/neutron/control/openvswitch/single.yml
index baa710e..da8dee0 100644
--- a/neutron/control/openvswitch/single.yml
+++ b/neutron/control/openvswitch/single.yml
@@ -13,8 +13,10 @@
     neutron_enable_bgp_vpn: False
     neutron_bgp_vpn_driver: bagpipe
     internal_protocol: 'http'
+    openstack_node_role: primary
   neutron:
     server:
+      role: ${_param:openstack_node_role}
       global_physnet_mtu: ${_param:neutron_global_physnet_mtu}
       l3_ha: ${_param:neutron_l3_ha}
       dvr: ${_param:neutron_control_dvr}