BIS-41 SP-57 Fixing more broken tests.

...a/ch/systemsx/cisd/openbis/generic/server/ETLService.java

.../openbis/generic/server/batch/AbstractBatchOperation.java

.../generic/server/batch/AbstractBatchOperationDelegate.java

...cisd/openbis/generic/server/batch/DataSetBatchUpdate.java

...openbis/generic/server/batch/IBatchOperationDelegate.java

...temsx/cisd/openbis/generic/server/batch/SampleUpdate.java

...systemsx/cisd/openbis/generic/shared/IETLLIMSService.java

.../systemsx/cisd/openbis/generic/server/ETLServiceTest.java

...cisd/openbis/generic/shared/IETLLIMSService.java.expected

...systemsx/cisd/openbis/systemtest/EntityOperationTest.java