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-contrail/init.yml b/classes/cluster/virtual-mcp11-contrail/init.yml
index 9a5b947..ade1433 100755
--- a/classes/cluster/virtual-mcp11-contrail/init.yml
+++ b/classes/cluster/virtual-mcp11-contrail/init.yml
@@ -1,6 +1,7 @@
 classes:
 - service.grafana.collector
 - system.heka.log_collector.single
+- system.heka.log_collector.output.telegraf
 - system.linux.system.repo.mcp.extra
 - system.linux.system.single
 - system.rsyslog.client.single