OZG-1274 map client attribute 'hasPostfachNachricht'

.../goofy/common/binaryfile/BinaryFileMaxSizeConstraint.java

...java/de/itvsh/goofy/common/binaryfile/BinaryFileUnit.java

...oofy/common/binaryfile/UploadBinaryFileSizeValidator.java

...-server/src/main/java/de/itvsh/goofy/vorgang/Eingang.java

...r/src/main/java/de/itvsh/goofy/vorgang/VorgangHeader.java

...main/java/de/itvsh/goofy/vorgang/VorgangHeaderMapper.java

...itvsh/goofy/wiedervorlage/WiedervorlageRemoteService.java

...va/de/itvsh/goofy/wiedervorlage/WiedervorlageService.java

goofy-server/src/main/resources/application.yml

...va/de/itvsh/goofy/common/binaryfile/BinaryFileITCase.java

...tvsh/goofy/common/callcontext/CallContextTestFactory.java

...e/itvsh/goofy/vorgang/GrpcClientAttributeTestFactory.java

.../java/de/itvsh/goofy/vorgang/VorgangHeaderMapperTest.java

...e/itvsh/goofy/wiedervorlage/WiedervorlageServiceTest.java