Install iptables on mcp-aio cfg node

iptables required for libvirt protection. so need to install it
on cfg node to pass tests

Change-Id: Ic2969bafba69dc87477e7928cf74086df262adaf
diff --git a/classes/cluster/virtual-mcp11-aio/.env b/classes/cluster/virtual-mcp11-aio/.env
index 5b16136..e138b42 100644
--- a/classes/cluster/virtual-mcp11-aio/.env
+++ b/classes/cluster/virtual-mcp11-aio/.env
@@ -1 +1 @@
-FORMULAS_SALT_MASTER+=(java openssh ntp nginx collectd sensu heka sphinx mysql galera grafana libvirt rsyslog glusterfs postfix xtrabackup freeipa prometheus telegraf elasticsearch kibana rundeck devops-portal libvirt rsyslog memcached rabbitmq apache keystone glance nova neutron cinder heat horizon ironic tftpd-hpa bind powerdns designate barbican)
+FORMULAS_SALT_MASTER+=(java openssh ntp nginx collectd sensu heka sphinx mysql galera grafana libvirt rsyslog glusterfs postfix xtrabackup freeipa prometheus telegraf elasticsearch kibana rundeck devops-portal libvirt rsyslog memcached rabbitmq apache keystone glance nova neutron cinder heat horizon ironic tftpd-hpa bind powerdns designate barbican iptables)