Allow enabling Octavia manager for single gateway deployments

Change-Id: I40ddf8242ccf20c33da95a8e70ec401197ed1ddd
diff --git a/reclass/storage/system/openstack_gateway_single_octavia.yml b/reclass/storage/system/openstack_gateway_single_octavia.yml
new file mode 100644
index 0000000..f43e6a1
--- /dev/null
+++ b/reclass/storage/system/openstack_gateway_single_octavia.yml
@@ -0,0 +1,9 @@
+classes:
+- system.reclass.storage.system.openstack_gateway_single
+parameters:
+  reclass:
+    storage:
+      node:
+        openstack_gateway_node01:
+          classes:
+          - system.octavia.manager.single