Use system backend default class

As multinode models are using backend default class for ceilometer
it also should be used for aio.

Change-Id: Ied73993d52f5aabec1edb24ff6233ce9df2e9adb
diff --git a/classes/cluster/virtual-mcp11-aio-telemetry/openstack/init.yml b/classes/cluster/virtual-mcp11-aio-telemetry/openstack/init.yml
index f4c7060..5b7810b 100755
--- a/classes/cluster/virtual-mcp11-aio-telemetry/openstack/init.yml
+++ b/classes/cluster/virtual-mcp11-aio-telemetry/openstack/init.yml
@@ -22,8 +22,7 @@
 - service.panko.server.single
 - service.ceilometer.server.single
 - service.ceilometer.agent.single
-- service.ceilometer.server.publisher.gnocchi
-- service.ceilometer.server.publisher.panko
+- system.ceilometer.server.backend.default
 parameters:
   _param:
     cluster_public_protocol: http
@@ -49,6 +48,8 @@
     ceilometer_service_host: ${_param:single_address}
     panko_service_host: ${_param:single_address}
     gnocchi_service_host: ${_param:single_address}
+    # ceilometer database host is hardcoded on service level
+    ceilometer_database_host: ${_param:single_address}
 
   nova:
     controller:
@@ -82,14 +83,10 @@
           enabled: ${_param:rabbitmq_ssl_enabled}
   ceilometer:
     server:
-      database: ~
       message_queue:
         port: ${_param:rabbitmq_port}
         ssl:
           enabled: ${_param:rabbitmq_ssl_enabled}
-      publisher:
-        default:
-          enabled: false
     agent:
       polling:
         sources: