Merge pull request #666 from comel/parser-sanity-check-1

(MODULES-4200) Add simple sanity check for the rule to hash parser

diff --cc lib/puppet/provider/firewall/iptables.rb
Simple merge

diff --cc spec/fixtures/iptables/conversion_hash.rb
Simple merge

diff --cc spec/unit/puppet/provider/iptables_spec.rb
Simple merge