add sample batch import benchmark to slow tests

SVN: 27562

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

@@ -39,6 +39,7 @@ import ch.systemsx.cisd.common.filesystem.FileUtilities;
  * 
  * @author Jakub Straszewski
  */
+@Test(groups = "slow")
 public class SampleBatchImportBenchmarkSystemTest extends SystemTestCase
 {
     // for jython script go to