[LMS-1676] initial changes in sample update; small refactoring

...eric/server/business/bo/AbstractSampleBusinessObject.java

...cisd/openbis/generic/server/business/bo/ExperimentBO.java

...msx/cisd/openbis/generic/server/business/bo/SampleBO.java

.../openbis/generic/shared/basic/dto/BasicSampleUpdates.java

.../systemsx/cisd/openbis/generic/shared/basic/dto/Code.java

...generic/shared/translator/DataStoreServiceTranslator.java

...cation/detailviewers/ExperimentPlateLocationsSection.java

...bis/plugin/screening/server/logic/PlateContentLoader.java