neutron rules are saved in /etc/sysconfig/iptables and /etc/sysconfig/ip6tables in Red Hat OpenStack Director

Issue

Iptables neutron runtime rules are saved into iptables startup config. This causes old stale neutron rules to be loaded at boot time.

This issue can be triggered by:

• An administrator ran servce iptables save and saved temporary neutron rules into /etc/sysconfig/iptables and /etc/sysconfig/ip6tables.
• OpenStack Director made neutron iptables rules persistent: https://bugzilla.redhat.com/show_bug.cgi?id=1541528