BIS-226 SP-327 readonly access to vocabularies from search service

...cisd/etlserver/registrator/api/v1/impl/SearchService.java

...tlserver/registrator/api/v1/impl/VocabularyImmutable.java

...rver/registrator/api/v1/impl/VocabularyTermImmutable.java

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

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

...is/dss/generic/shared/api/internal/v1/ISearchService.java

.../generic/shared/api/internal/v1/IVocabularyImmutable.java

...eric/shared/api/internal/v1/IVocabularyTermImmutable.java

...-test/1/dss/drop-boxes/rich-test/rich-data-set-handler.py

...erver/systemtests/FeatureRichDataSetImportSystemTest.java