Support for IPv6

[chantra]

Passing the test is pending on
mizzy/specinfra#210
mizzy/serverspec#469

-----> Starting Kitchen (v1.2.2.dev)
-----> Verifying ...
Removing /tmp/busser/suites/serverspec
Uploading /tmp/busser/suites/serverspec/list_of_tables_spec.rb
(mode=0644)
-----> Running serverspec test suite
/opt/chef/embedded/bin/ruby -I/tmp/busser/suites/serverspec -S
/opt/chef/embedded/bin/rspec /tmp/busser/suites/
serverspec/list_of_tables_spec.rb --color --format documentation

   iptables
     should have rule "-A INPUT -j simple_rule"
     should have rule "-A simple_rule -p tcp -m tcp --dport 80 -j ACCEPT"
     should have rule "-A INPUT -p tcp -m tcp --dport 81 -j ACCEPT"
     should have rule "-A FORWARD -p tcp -m tcp --dport 82 -j ACCEPT"
     should have rule "-A INPUT -m state --state NEW -j jump_with_rule"
     should have rule "-A jump_with_rule -p tcp -m tcp --dport 83 -j ACCEPT"
     should have rule "-A array_of_rules -p tcp -m tcp --dport 84 -j ACCEPT"
     should have rule "-A array_of_rules -p tcp -m tcp --dport 85 -j ACCEPT"
     should have rule "-A INPUT -j array_of_rules"
     should not have rule "*nat"
     should have rule "*mangle"
     should have rule "*filter"
     should not have rule "*raw"

   ip6tables
     should have rule "-A INPUT -j simple_rule"
     should have rule "-A simple_rule -p tcp -m tcp --dport 80 -j ACCEPT"
     should have rule "-A INPUT -p tcp -m tcp --dport 81 -j ACCEPT"
     should not have rule "-A FORWARD -p tcp -m tcp --dport 82 -j ACCEPT"
     should not have rule "-A INPUT -m state --state NEW -j jump_with_rule"
     should not have rule "-A jump_with_rule -p tcp -m tcp --dport 83 -j ACCEPT"
     should have rule "-A array_of_rules -p tcp -m tcp --dport 84 -j ACCEPT"
     should have rule "-A array_of_rules -p tcp -m tcp --dport 85 -j ACCEPT"
     should have rule "-A INPUT -j array_of_rules"
     should not have rule "*nat"
     should have rule "*mangle"
     should have rule "*filter"
     should not have rule "*raw"

   Finished in 0.23916 seconds
   26 examples, 0 failures
   Finished verifying <ipv6-list-of-tables-centos-65> (0m1.63s).

-----> Kitchen is finished. (0m2.37s)

[chantra]

specinfra and serverspec have merged the PR, tests are now passing out of the box when using kitchen test

[rtkrruvinskiy]

Chantra, thanks a lot for your contribution! Looks really good, aside from the one comment that I made.

[chantra]

@rtkrruvinskiy I have just refactored the code in chantra/cookbook-simple-iptables@1a37646