Add Ironic metadata for memcache security strategy

Change-Id: I5cef5967ebfce23a22025b885b75b67dd129ab1d
Related-Prod: PROD-23561
diff --git a/ironic/api/cluster.yml b/ironic/api/cluster.yml
index fe90091..5bbf8ce 100644
--- a/ironic/api/cluster.yml
+++ b/ironic/api/cluster.yml
@@ -33,3 +33,8 @@
           cert_file: ${_param:rabbitmq_ironic_client_ssl_cert_file}
         ssl:
           enabled: ${_param:rabbitmq_ssl_enabled}
+      cache:
+        security:
+          enabled: ${_param:ironic_memcache_security_enabled}
+          strategy: ${_param:openstack_memcache_security_strategy}
+          secret_key: ${_param:ironic_memcache_secret_key}