Add iptables-services to installed packages in run_tests.sh
Add iptables-services to installed packages in run_tests.sh

The puppet-firewall code uses /usr/libexec/iptables/iptables.init,
which is provided by the iptables-services package. This package is
commonly included, but let's be safe.

Change-Id: Ifb917f370b63184378ea6b399ca3a5a3f85eabc0

mahak/packstack,fr34k8/packstack,stackforge/packstack,mahak/packstack,openstack/packstack,fr34k8/packstack,stackforge/packstack,openstack/packstack,fr34k8/packstack,mahak/packstack,openstack/packstack,stackforge/packstack