[LMS-1229] fixed dataset search with multiple db instances

...ss/bo/common/entity/ExperimentProjectGroupCodeRecord.java

...siness/bo/common/entity/ISecondaryEntityListingQuery.java

.../server/business/bo/common/entity/SecondaryEntityDAO.java

...neric/server/business/bo/datasetlister/DatasetLister.java

.../server/business/bo/samplelister/SampleListingWorker.java

...sd/openbis/generic/shared/basic/dto/DatabaseInstance.java

...generic/shared/translator/DatabaseInstanceTranslator.java

...ess/bo/common/entity/SecondaryEntityListingQueryTest.java