SP-539, BIS-339: Implemented, unit tests adapted but no new unit tests.

...e/java/ch/systemsx/cisd/etlserver/path/IPathsInfoDAO.java

...emsx/cisd/etlserver/path/PathInfoDatabaseFeedingTask.java

...penbis/dss/generic/server/EncapsulatedOpenBISService.java

...bis/dss/generic/shared/PathInfoDatabaseVersionHolder.java

datastore_server/source/sql/postgresql/006/schema-006.sql

...ver/source/sql/postgresql/migration/migration-005-006.sql

...lserver/path/DatabaseBasedDataSetPathsInfoFeederTest.java

.../cisd/etlserver/path/PathInfoDatabaseFeedingTaskTest.java

...s/dss/generic/shared/HierarchicalContentProviderTest.java

...x/cisd/openbis/generic/shared/dto/DatasetDescription.java

...enbis/generic/shared/dto/SimpleDataSetInformationDTO.java

.../openbis/generic/shared/translator/DataSetTranslator.java

...penbis/generic/shared/translator/SimpleDataSetHelper.java