parametrize endpoints

Change-Id: I6083b410969f35ad87d36a53e11016c699155291
diff --git a/metadata/service/server/single.yml b/metadata/service/server/single.yml
index 7b5e146..8cd1b5b 100644
--- a/metadata/service/server/single.yml
+++ b/metadata/service/server/single.yml
@@ -3,6 +3,8 @@
 classes:
 - service.aodh.support
 parameters:
+  _param:
+    keystone_aodh_endpoint_type: internalURL
   aodh:
     server:
       enabled: true
@@ -25,6 +27,7 @@
         tenant: service
         user: aodh
         password: ${_param:keystone_aodh_password}
+        endpoint_type: ${_param:keystone_aodh_endpoint_type}
       message_queue:
         engine: rabbit
         host: ${_param:single_address}