SSDM-3348: fixing dto inconsistencies

.../openbis/generic/asapi/v3/dto/common/id/ObjectTechId.java

...c/asapi/v3/dto/common/search/AbstractDateObjectValue.java

...api/v3/dto/common/search/AbstractFieldSearchCriteria.java

...bis/generic/asapi/v3/dto/common/search/AbstractValue.java

...i/v3/dto/common/search/DateEarlierThanOrEqualToValue.java

...c/asapi/v3/dto/common/search/DateFieldSearchCriteria.java

...api/v3/dto/common/search/DateLaterThanOrEqualToValue.java

...to/common/search/DateObjectEarlierThanOrEqualToValue.java

...ic/asapi/v3/dto/common/search/DateObjectEqualToValue.java

.../dto/common/search/DateObjectLaterThanOrEqualToValue.java

...eneric/asapi/v3/dto/common/search/NumberEqualToValue.java

...asapi/v3/dto/common/search/NumberFieldSearchCriteria.java

...nbis/generic/asapi/v3/dto/common/search/SearchResult.java

...asapi/v3/dto/common/search/StringFieldSearchCriteria.java

.../openbis/generic/asapi/v3/dto/common/search/TimeZone.java

.../v3/dto/experiment/create/CreateExperimentsOperation.java

...o/experiment/create/CreateExperimentsOperationResult.java

...ic/asapi/v3/dto/sample/create/CreateSamplesOperation.java

...pi/v3/dto/sample/create/CreateSamplesOperationResult.java

...is/generic/asapi/v3/dto/sample/create/SampleCreation.java