SP-524, BIS-278: Implemented and partially tested

...neric/client/web/client/application/GenericConstants.java

...t/application/ui/attachment/AttachmentDownloadHelper.java

...sd/openbis/generic/client/web/server/AbstractServlet.java

...nbis/generic/server/api/v1/GeneralInformationService.java

...eneric/server/api/v1/GeneralInformationServiceLogger.java

...server/authorization/predicate/ExperimentIdPredicate.java

...ic/server/authorization/predicate/ProjectIdPredicate.java

...ric/server/authorization/predicate/SampleIdPredicate.java

...x/cisd/openbis/generic/server/business/bo/IProjectBO.java

...sx/cisd/openbis/generic/server/business/bo/ProjectBO.java

...stemsx/cisd/openbis/generic/shared/api/v1/Translator.java

...bis/generic/shared/basic/AttachmentDownloadConstants.java

.../generic/client/web/server/AttachmentDownloadServlet.java

...eric/client/web/server/AttachmentDownloadServletTest.java

...nbis/systemtest/api/v1/GeneralInformationServiceTest.java

...bis/generic/shared/api/v1/IGeneralInformationService.java

...sx/cisd/openbis/generic/shared/api/v1/dto/Attachment.java

...nbis/generic/shared/api/v1/dto/id/project/IProjectId.java

...ric/shared/api/v1/dto/id/project/ProjectIdentifierId.java

...generic/shared/api/v1/dto/id/project/ProjectPermIdId.java