SSDM-802: add log message when example data set will be dropped.

SVN: 32404

datastore_server/sourceTest/java/ch/systemsx/cisd/openbis/datastoreserver/systemtests/SystemTestCase.java

@@ -334,6 +334,7 @@ public abstract class SystemTestCase extends AssertJUnit
 
     protected void moveFileToIncoming(File exampleDataSet) throws IOException
     {
+        operationLog.info("Drop an example data set for " + getClass().getSimpleName());
         FileUtils.moveDirectoryToDirectory(exampleDataSet, getIncomingDirectory(), false);
     }