Added some hacks to get http get calls to be validated when an attribute exists on a controller action

--HG--
branch : dev

src/Orchard.Web/Global.asax.cs

@@ -37,6 +37,8 @@ namespace Orchard.Web {
         }
 
         protected void Application_BeginRequest() {
+            Context.Items["originalHttpContext"] = Context;
+
             _host.BeginRequest();
         }