Add support for using iptables-restore to apply the rules

[bbinet]

This will not save or flush current iptables rules so that it makes the iptables-restore provider compatible with docker or similar software that manage their own rules in iptables.

[epcim]

do you need help with failing tests?

[bbinet]

Thanks, I will have a look at the beginning of next week.

[bbinet]

Tests are now fixed.

[bbinet]

ping @epcim