add opencontrail formula

Change-Id: I35d4f3e5b7e1d92af73b22bdc76912921e2066ab
diff --git a/classes/cluster/os-ha-contrail-40/.env b/classes/cluster/os-ha-contrail-40/.env
index 89b7f61..83ae21f 100644
--- a/classes/cluster/os-ha-contrail-40/.env
+++ b/classes/cluster/os-ha-contrail-40/.env
@@ -1,4 +1,4 @@
 EXTRA_FORMULAS="barbican linux salt reclass maas memcached openssh ntp sphinx \
         grafana libvirt rsyslog glusterfs postfix xtrabackup freeipa prometheus telegraf \
         elasticsearch kibana rundeck devops-portal rsync docker keepalived aptly jenkins \
-        gerrit artifactory influxdb horizon nginx collectd heka mysql nova"
+        gerrit artifactory influxdb horizon nginx collectd heka mysql nova opencontrail"