Enable Telegraf output for log_collector

This change also adds the log_collector service to the Kubernetes labs.

Change-Id: I38fd19c6f5c801078c9eb3b99e75fd352bfc3d9f
diff --git a/classes/cluster/virtual-mcp11-k8s-calico/stacklight/init.yml b/classes/cluster/virtual-mcp11-k8s-calico/stacklight/init.yml
index a6b4118..243a614 100644
--- a/classes/cluster/virtual-mcp11-k8s-calico/stacklight/init.yml
+++ b/classes/cluster/virtual-mcp11-k8s-calico/stacklight/init.yml
@@ -22,6 +22,10 @@
     galera_server_cluster_name: monitoring_cluster
     galera_server_maintenance_password: workshop
     galera_server_admin_password: workshop
+
+    heka_elasticsearch_host: ${_param:stacklight_monitor_address}
+    elasticsearch_port: 9200
+    stacklight_environment: ${_param:cluster_domain}
   linux:
     network:
       host: