OZG-7324: Fix License Header

...re/src/main/java/de/ozgcloud/apilib/alfa/AlfaService.java

...main/java/de/ozgcloud/apilib/alfa/CommandAlfaService.java

.../java/de/ozgcloud/apilib/alfa/dummy/DummyAlfaService.java

...va/de/ozgcloud/apilib/common/callcontext/CallContext.java

...ommon/callcontext/DefaultOzgCloudCallContextProvider.java

.../callcontext/OzgCloudCallContextAttachingInterceptor.java

...pilib/common/callcontext/OzgCloudCallContextProvider.java

...va/de/ozgcloud/apilib/common/command/OzgCloudCommand.java

.../de/ozgcloud/apilib/common/command/OzgCloudCommandId.java

...zgcloud/apilib/common/command/OzgCloudCommandService.java

...ozgcloud/apilib/common/command/OzgCloudCommandStatus.java

...ilib/common/command/OzgCloudCreateSubCommandsRequest.java

...de/ozgcloud/apilib/common/command/grpc/CommandMapper.java

...pilib/common/command/grpc/GrpcOzgCloudCommandService.java

...oud/apilib/common/command/grpc/OzgCloudCommandMapper.java

...n/java/de/ozgcloud/apilib/common/datatypes/GenericId.java

...gcloud/apilib/common/errorhandling/NotFoundException.java

...e/src/main/java/de/ozgcloud/apilib/file/OzgCloudFile.java

.../main/java/de/ozgcloud/apilib/file/OzgCloudFileGroup.java

...src/main/java/de/ozgcloud/apilib/file/OzgCloudFileId.java