code: public static void deleteAllTransac(DbConn cnx)
      {
          cnx.runUpdate("deliverable_delete_all");
          cnx.runUpdate("message_delete_all");
          cnx.runUpdate("history_delete_all");
          cnx.runUpdate("jiprm_delete_all");
          cnx.runUpdate("ji_delete_all");
      }
docs: This method is an exception - it does not deal with metadata but transactional data. It is included here to allow easier purge of
  metadata.<br>
  No commit performed.
  
  @param cnx