SSDM-3348: fixing js-dto inconsistencies: avoiding npe with null fetch options

...neric/server/asapi/v3/helper/generators/DtoGenerator.java

...s/public/resources/api/v3/as/dto/attachment/Attachment.js

...openbis/public/resources/api/v3/as/dto/dataset/DataSet.js

...nbis/public/resources/api/v3/as/dto/dataset/LinkedData.js

...is/public/resources/api/v3/as/dto/dataset/PhysicalData.js

...enbis/public/resources/api/v3/as/dto/deletion/Deletion.js

...s/public/resources/api/v3/as/dto/experiment/Experiment.js

...v3/as/dto/experiment/create/CreateExperimentsOperation.js

...dto/experiment/create/CreateExperimentsOperationResult.js

...blic/resources/api/v3/as/dto/global/GlobalSearchObject.js

...is/public/resources/api/v3/as/dto/history/HistoryEntry.js

...enbis/public/resources/api/v3/as/dto/material/Material.js

...d/openbis/public/resources/api/v3/as/dto/person/Person.js

...openbis/public/resources/api/v3/as/dto/project/Project.js

...d/openbis/public/resources/api/v3/as/dto/sample/Sample.js

...i/v3/as/dto/sample/create/CreateSamplesOperationResult.js

...isd/openbis/public/resources/api/v3/as/dto/space/Space.js

...sx/cisd/openbis/public/resources/api/v3/as/dto/tag/Tag.js

...s/public/resources/api/v3/as/dto/vocabulary/Vocabulary.js

...blic/resources/api/v3/as/dto/vocabulary/VocabularyTerm.js