Add Ironic metadata for memcache security strategy

Change-Id: I5cef5967ebfce23a22025b885b75b67dd129ab1d
Related-Prod: PROD-23561
diff --git a/defaults/openstack/init.yml b/defaults/openstack/init.yml
index 284672a..1c864e5 100644
--- a/defaults/openstack/init.yml
+++ b/defaults/openstack/init.yml
@@ -33,6 +33,9 @@
     # Barbican
     barbican_memcache_security_enabled: ${_param:openstack_memcache_security_enabled}
     barbican_memcache_secret_key: ''
+    # Ironic
+    ironic_memcache_security_enabled: ${_param:openstack_memcache_security_enabled}
+    ironic_memcache_secret_key: ''
     # Openstack memcached server protocols
     openstack_memcached_proto_tcp_enabled: True
     openstack_memcached_proto_udp_enabled: False