Add fluentd to the virtual-mcp11-contrail

Change-Id: I31ab63a33435140dea6c61248d4f4c966c7f9d56
diff --git a/classes/cluster/virtual-mcp11-contrail/.env b/classes/cluster/virtual-mcp11-contrail/.env
index a4bacd1..49c1ca4 100644
--- a/classes/cluster/virtual-mcp11-contrail/.env
+++ b/classes/cluster/virtual-mcp11-contrail/.env
@@ -1 +1 @@
-EXTRA_FORMULAS="grafana heka nginx ntp prometheus rsyslog sphinx telegraf"
+EXTRA_FORMULAS="fluentd grafana heka nginx ntp prometheus rsyslog sphinx telegraf"