Add conditional dependency

Add a conditional dependency that glance::registry
should be configured only after its database is
created.

This code only needs to be created on active nodes.

manifests/controller.pp

@@ -93,8 +93,10 @@ class openstack::controller (
 
   ####### DATABASE SETUP ######
   # set up mysql server
-  case $db_type {
-    'mysql': {
+  if ($db_type == 'mysql') {
+    if ($enabled) {
+      Class['glance::db::mysql'] -> Class['glance::registry']
+    }
     class { 'openstack::db::mysql':
       mysql_root_password    => $mysql_root_password,
       mysql_bind_address     => $mysql_bind_address,
@@ -109,7 +111,7 @@ class openstack::controller (
       nova_db_password       => $nova_db_password,
       nova_db_dbname         => $nova_db_dbname,
       allowed_hosts          => $allowed_hosts,
-      }
+      enabled                => $enabled,
     }
   }