Add aodh metadata for memcache security strategy

Change-Id: Ic4caa502221ab917116d9fd90d4d110c3876337d
Related-Prod: PROD-23561
diff --git a/defaults/openstack/init.yml b/defaults/openstack/init.yml
index aa39c0d..468778a 100644
--- a/defaults/openstack/init.yml
+++ b/defaults/openstack/init.yml
@@ -21,3 +21,6 @@
     # Heat
     heat_memcache_security_enabled: ${_param:openstack_memcache_security_enabled}
     heat_memcache_secret_key: ''
+    # Aodh
+    aodh_memcache_security_enabled: ${_param:openstack_memcache_security_enabled}
+    aodh_memcache_secret_key: ''