OZG-7573 license header and clean up

eingang-manager-interface/pom.xml

...g-manager-interface/src/main/protobuf/forward.model.proto

eingang-manager-interface/src/main/protobuf/forward.proto

.../eingang/forwarder/EingangStubReceiverStreamObserver.java

.../main/java/de/ozgcloud/eingang/forwarder/FileService.java

...e/ozgcloud/eingang/forwarder/IncomingFileGroupMapper.java

...ava/de/ozgcloud/eingang/forwarder/IncomingFileMapper.java

.../de/ozgcloud/eingang/forwarder/RouteForwardingMapper.java

...cloud/eingang/forwarder/GrpcAntragstellerTestFactory.java

...loud/eingang/forwarder/GrpcAttachmentFileTestFactory.java

...zgcloud/eingang/forwarder/GrpcEingangStubTestFactory.java

.../eingang/forwarder/GrpcRepresentationFileTestFactory.java

...cloud/eingang/forwarder/GrpcRouteCriteriaTestFactory.java

...gang/forwarder/GrpcRouteForwardingRequestTestFactory.java

...oud/eingang/forwarder/GrpcRouteForwardingTestFactory.java

...gcloud/eingang/forwarder/IncomingFileGroupMapperTest.java

...de/ozgcloud/eingang/forwarder/IncomingFileMapperTest.java

...ozgcloud/eingang/forwarder/RouteForwardingMapperTest.java

...zgcloud/eingang/forwarder/RouteForwardingServiceTest.java

router/pom.xml