Organization module refactor, in-module firewall policy factory for organization and folder (#385)

* move iam and logging to separate files, minimal refactoring

* update README

* fix example

* factory

* tfdoc

* boilerplate

* remove data_folder variable

* tfdoc

* fix default factory name

* add firewall policy to folder module

* add factory example

modules/net-vpc-firewall/main.tf

@@ -28,7 +28,8 @@ locals {
     })
   }
 
-  cidrs = try({ for name, cidrs in yamldecode(file("${var.cidr_template_file}")) :
+  cidrs = try({
+    for name, cidrs in yamldecode(file(var.cidr_template_file)) :
     name => cidrs
   }, {})