Fix neutron.server.identity indent

Related-PROD: PROD-27107

Change-Id: I1a5ec762da90079f274f547665140e20f5ba13be
diff --git a/neutron/control/cluster.yml b/neutron/control/cluster.yml
index 63e4faf..91b410b 100644
--- a/neutron/control/cluster.yml
+++ b/neutron/control/cluster.yml
@@ -37,5 +37,5 @@
         ssl:
           enabled: ${_param:galera_ssl_enabled}
       role: ${_param:openstack_node_role}
-    identity:
-      protocol: ${_param:cluster_internal_protocol}
+      identity:
+        protocol: ${_param:cluster_internal_protocol}