Remove leftover of the tripleo::firewall class
Remove leftover of the tripleo::firewall class

This is follow-up of e64e47ebc74412856bd5aaf3f8443f350aa8452f and
removes the ConfigDebug parameter from haproxy template beause it was
used by the implementation to run puppet to firewall rules, which was
already removed.

Change-Id: I6f1c31bc77d6a4f79bcafd7d7565c74f8b0ddb26

openstack/tripleo-heat-templates,openstack/tripleo-heat-templates