SSDM-1019 : V3 AS API - Fully cover all existing methods with automated tests

...ver/api/v3/translator/entity/sample/SampleTranslator.java

...a/ch/ethz/sis/openbis/systemtest/api/v3/AbstractTest.java

.../ethz/sis/openbis/systemtest/api/v3/CreateSampleTest.java

...ethz/sis/openbis/systemtest/api/v3/MapExperimentTest.java

.../ch/ethz/sis/openbis/systemtest/api/v3/MapSampleTest.java

...bis/sourceTest/sql/postgresql/143/028=experiments_all.tsv

openbis/sourceTest/sql/postgresql/143/057=samples_all.tsv

...enbis/generic/shared/api/v3/dto/entity/sample/Sample.java

...ed/api/v3/dto/fetchoptions/sample/SampleFetchOptions.java