restore use of handler per review

Author: qqmyers

src/main/java/edu/harvard/iq/dataverse/DatasetServiceBean.java

@@ -738,11 +738,11 @@ private void exportAllDatasets(boolean forceReExport, Date reExportDate) {
         try {
             fileHandler = new FileHandler(logFileName);
             exportLogger.setUseParentHandlers(false);
+            exportLogger.addHandler(fileHandler);
         } catch (IOException | SecurityException ex) {
             Logger.getLogger(DatasetServiceBean.class.getName()).log(Level.SEVERE, null, ex);
             return;
         }
-
         exportLogger.info("Starting an export all job");
 
         for (Long datasetId : findAllLocalDatasetIds()) {