SP-416 BIS-270 extract read only methods from transaction to search service

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

...registrator/api/v2/IDataSetRegistrationTransactionV2.java

...ver/registrator/api/v2/impl/AbstractTransactionState.java

...gistrator/api/v2/impl/DataSetRegistrationTransaction.java

...cisd/etlserver/registrator/api/v2/impl/SearchService.java

...neric/server/EncapsulatedFilteredBasicOpenBISService.java

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

.../dss/generic/shared/IEncapsulatedBasicOpenBISService.java

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

...is/dss/generic/shared/api/internal/v2/ISearchService.java