Feature/ipv6

[elthariel]

Description

This PR adds IPv6 support to this cookbook. It basically just duplicates IPv4 support

Issues Resolved

refs #32

Check List

• [x] 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

I haven't signed the DCO, but my commits are Signed-Off as I think this is the new policy ?

[elthariel]

PS: The lint errors are not part of this PR

[elthariel]

Guys, can you have a look at the PR ?

[rmoriz]

can you rebase/fix conflicts?

[elthariel]

@rmoriz Should be good. Feel free to squash before merging

[tas50]

Thanks @elthariel