SSDM-55: Adding multivalued property handling for Samples

...stemsx/cisd/openbis/generic/shared/api/v1/dto/Sample.java

...pi/v3/executor/property/UpdateEntityPropertyExecutor.java

...rver/asapi/v3/translator/property/PropertyTranslator.java

...ric/server/xls/export/helper/AbstractXLSExportHelper.java

...r/xls/importer/helper/PropertyAssignmentImportHelper.java

.../server/xls/importer/helper/PropertyTypeImportHelper.java

.../generic/server/api/v1/sort/SampleSearchResultSorter.java

...r/business/bo/fetchoptions/samplelister/SampleLister.java

...eric/server/business/search/sort/IEntitySearchResult.java

...erver/business/search/sort/SearchResultSorterByScore.java

...sx/cisd/openbis/generic/shared/dto/DataSetPropertyPE.java

...msx/cisd/openbis/generic/shared/dto/SamplePropertyPE.java

...er/business/search/sort/SearchResultSorterTestHelper.java