[LMS-988] rebuild hierarchical structure of data store

...ch/systemsx/cisd/openbis/dss/generic/DataStoreServer.java

...sd/openbis/dss/generic/server/DataSetHierarchyHelper.java

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

...openbis/dss/generic/server/HierarchicalStorageDaemon.java

...stemsx/cisd/openbis/dss/generic/server/SoftLinkMaker.java

...enbis/dss/generic/shared/IEncapsulatedOpenBISService.java

...penbis/dss/generic/server/DataSetHierarchyHelperTest.java

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

...ystemsx/cisd/openbis/generic/server/ETLServiceLogger.java

...openbis/generic/server/business/bo/ExternalDataTable.java

...penbis/generic/server/business/bo/IExternalDataTable.java

...enbis/generic/server/business/bo/SimpleDataSetHelper.java

...d/openbis/generic/server/dataaccess/IExternalDataDAO.java

...openbis/generic/server/dataaccess/db/ExternalDataDAO.java

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

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