Update the firewall cookbook to the latest version

This gives us comments from the named resources

cookbooks/firewall/libraries/helpers.rb

@@ -67,8 +67,8 @@ module FirewallCookbook
       end
     end
 
-    def ubuntu?(current_node)
-      current_node['platform'] == 'ubuntu'
+    def debian?(current_node)
+      current_node['platform_family'] == 'debian'
     end
 
     def build_rule_file(rules)
@@ -96,5 +96,10 @@ module FirewallCookbook
 
       false
     end
+
+    def default_description(new_resource)
+      new_resource.description ||
+        "Generated by chef from #{cookbook_name}[#{recipe_name}] by #{new_resource}"
+    end
   end
 end