BIS-1335: In exported ZIP, removed empty experiment folders, which contained...

BIS-1335: In exported ZIP, removed empty experiment folders, which contained no name (when provided).

server-application-server/source/java/ch/ethz/sis/openbis/generic/server/asapi/v3/executor/exporter/EntitiesFinder.java

@@ -247,7 +247,9 @@ class EntitiesFinder
 
     private static void configureFetchOptions(final DataSetFetchOptions dataSetFetchOptions)
     {
-        dataSetFetchOptions.withExperiment().withProject().withSpace();
+        final ExperimentFetchOptions experimentFetchOptions = dataSetFetchOptions.withExperiment();
+        experimentFetchOptions.withProperties();
+        experimentFetchOptions.withProject().withSpace();
         dataSetFetchOptions.withType().withPropertyAssignments().withPropertyType();
         dataSetFetchOptions.withProperties();
         dataSetFetchOptions.withRegistrator();