Ceilometer take into account cluster_internal_protocol variable

Change-Id: I0f6f60ecb1e229a04904dbbb613538d424385bbb
Related-Prod: PROD-18315
diff --git a/gnocchi/server/single.yml b/gnocchi/server/single.yml
index 11ddf39..c4e1547 100644
--- a/gnocchi/server/single.yml
+++ b/gnocchi/server/single.yml
@@ -6,6 +6,7 @@
       role: ${_param:openstack_node_role}
       identity:
         region: ${_param:openstack_region}
+        protocol: ${_param:internal_protocol}
       metricd:
         metric_processing_delay: 15
         metric_reporting_delay: 30