updated patch to generate parse_list for iptables-save output.

Hi,

sorry about that earlier version which broke the tests; I've fixed the code and tested with ruby 1.8.7, 1.9.3 and 2.0.0 and all tests are now successful.

The patch is to make 'puppet resource firewall' properly parse the iptables rules as generated by system-config-firewall-tui.

Thanks,
Frank