Add SSL for Elasticsearch

Change-Id: I0a525b82e6dfc536bec6953485f2d11e6f64cd54
PROD-related: PROD-29185
diff --git a/kibana/server/single.yml b/kibana/server/single.yml
index 965f274..5c59588 100644
--- a/kibana/server/single.yml
+++ b/kibana/server/single.yml
@@ -13,4 +13,5 @@
         engine: elasticsearch
         host: ${_param:kibana_elasticsearch_host}
         port: 9200
+        scheme: http