Ref: original & and use fileObj.meta

fileObj.meta is part of the ostrio:files API and be passed to the
constructor. This is less hacky than trying tu update a persistet object
after the fact.

models/exporter.js

@@ -80,11 +80,11 @@ export class Exporter {
 
         return {
           _id: attachment._id,
-          cardId: attachment.cardId,
+          cardId: attachment.meta.cardId,
           //url: FlowRouter.url(attachment.url()),
           file: filebase64,
-          name: attachment.original.name,
-          type: attachment.original.type,
+          name: attachment.name,
+          type: attachment.type,
         };
       });
     //When has a especific valid attachment return the single element