Make archive policy configurable

Change-Id: I603ce6922130fe32aa1a154df8146ee582bf1a45

puppet/services/ceilometer-base.yaml

@@ -115,6 +115,10 @@ parameters:
     description: Driver or drivers to handle sending notifications.
     constraints:
       - allowed_values: [ 'messagingv2', 'noop' ]
+  GnocchiArchivePolicy:
+    default: 'low'
+    type: string
+    description: archive policy to use with gnocchi backend
 
 conditions:
   service_debug_unset: {equals : [{get_param: CeilometerDebug}, '']}
@@ -149,7 +153,7 @@ outputs:
         ceilometer::agent::auth::auth_endpoint_type: 'internalURL'
         ceilometer::dispatcher::gnocchi::url: {get_param: [EndpointMap, GnocchiInternal, uri]}
         ceilometer::dispatcher::gnocchi::filter_project: 'service'
-        ceilometer::dispatcher::gnocchi::archive_policy: 'low'
+        ceilometer::dispatcher::gnocchi::archive_policy: {get_param: GnocchiArchivePolicy}
         ceilometer::dispatcher::gnocchi::resources_definition_file: 'gnocchi_resources.yaml'
         ceilometer::notification_driver: {get_param: NotificationDriver}
         ceilometer::rabbit_userid: {get_param: RabbitUserName}