ExportServlet - this is the servlet that the export service will call...this servlet in turn opens a httpurlconnection to the real export url, and saves the content in a file.
Removed ISOLATION_READ_COMMITTED from the transactions as it is not supported by the JTA transaction manager. We will have to rely on the database settings.
when a learner clicks on finish, it will call learnerService.completeToolSession which returns the link to the next activity. the tool then redirects to this new url