Avoid sending empty objects when the limit flag is used

and not all files in the dir are processed. FWIW - the empty objects 
were being sent to Dataverse and ignored, so the only real effect
(aside from inefficiency) appears to be an incorrect count from line
603 when using limit (and may be skip?)

Author: qqmyers

perma-danspidfk212v2.0 - Copy.zip

@@ -567,8 +567,10 @@ protected void postProcessChildren(Resource dir) {
                 for (Resource file : dir.listResources()) {
                     if (!file.isDirectory()) {
                         //println("Adding " + file.getName() + " to list: " + file.getMetadata().toString(2));
-
-                        jsonData.put(file.getMetadata());
+                        JSONObject fileMetadata = file.getMetadata();
+                        if(!fileMetadata.isEmpty()) {
+                            jsonData.put(file.getMetadata());
+                        }
                     }
                 }
                 meb.addTextBody("jsonData", jsonData.toString());