Added puppetlabs-firewall (required by puppetlabs-postgresql), updated the other modules.

modules/firewall/lib/facter/iptables_version.rb

@@ -0,0 +1,11 @@
+Facter.add(:iptables_version) do
+  confine :kernel => :linux
+  setcode do
+    version = Facter::Util::Resolution.exec('iptables --version')
+    if version
+      version.match(/\d+\.\d+\.\d+/).to_s
+    else
+      nil
+    end
+  end
+end