SSDM-6958: fixing tests by removing @Rollback from SystemTestCase

openbis/sourceTest/java/ch/systemsx/cisd/openbis/systemtest/SystemTestCase.java

@@ -83,7 +83,6 @@ import ch.systemsx.cisd.openbis.plugin.generic.shared.IGenericServer;
 // In 'commonContext.xml', our transaction manager is called 'transaction-manager' (by default
 // Spring looks for 'transactionManager').
 @Transactional(transactionManager = "transaction-manager")
-@Rollback(value = false)
 public abstract class SystemTestCase extends AbstractTransactionalTestNGSpringContextTests
 {
     private static final String SOURCE_TEST_CORE_PLUGINS = "sourceTest/core-plugins";