Add gtw node to reclass config in sl_os_ovs model

Change-Id: I6c0b934840a2aa16b29d0ea1db3f0d8e8fb5f6bd
diff --git a/classes/cluster/sl-os-ovs/infra/config.yml b/classes/cluster/sl-os-ovs/infra/config.yml
index 992394a..2cf3496 100644
--- a/classes/cluster/sl-os-ovs/infra/config.yml
+++ b/classes/cluster/sl-os-ovs/infra/config.yml
@@ -122,6 +122,19 @@
               value_template: <<node_tenant_ip>>
             external_address:
               value_template: <<node_external_ip>>
+        openstack_gateway:
+          expression: <<node_hostname>>__startswith__gtw
+          node_class:
+            value_template:
+              - cluster.<<node_cluster>>.openstack.gateway
+          node_param:
+            tenant_address:
+              value_template: <<node_tenant_ip>>
+            external_address:
+              value_template: <<node_external_ip>>
+          cluster_param:
+            openstack_gateway_node01_address:
+              value_template: <<node_control_ip>>
         stacklight_monitor_node01:
           expression: <<node_hostname>>__equals__mon01
           cluster_param: