Use persistent iptables package for Debian/Ubuntu config

[gfediere]

Description

• Use package iptables-persistent (https://packages.debian.org/fr/jessie/iptables-persistent) on Ubuntu/Debian for loading rules instead of post network script

• Do not use temporary file:/etc/iptables/general for Debian/Ubuntu and only have one file for persisted rule

• Also fix resources/templates accordingly

Issues Resolved

None but i will solve issue #58 in the next commit by checking consistency of /etc/sysconfig/iptables or /etc/iptables/rules.v4 depending of the system

Check List

• [ ] All tests pass. See https://github.com/chef-cookbooks/community_cookbook_documentation/blob/master/TESTING.MD
• [x] New functionality includes testing.
• [ ] New functionality has been documented in the README if applicable
• [x] All commits have been signed for the Developer Certificate of Origin. See https://github.com/chef-cookbooks/community_cookbook_documentation/blob/master/CONTRIBUTING.MD

[tas50]

This looks like a serious improvement to how we were handling rules previously. Just move that config file logic into a variable and out of the attribute and we'll get this shipped. Thanks

[gfediere]

@tas50 just pushed changes tell me if you are ok with it.

[zabudskyi]

Actually it seems it will resolve issue with Ubuntu 18.04. Now iptables rules are not restored after reboot. I had to add systemd service, though not sure it's good approach.