SSDM-13365: Updated copyright comments in lib-file-download

...ava/ch/ethz/sis/filetransfer/AbstractBulkInputStream.java

...load/source/java/ch/ethz/sis/filetransfer/AbstractId.java

.../source/java/ch/ethz/sis/filetransfer/AbstractLogger.java

...-download/source/java/ch/ethz/sis/filetransfer/Chunk.java

...ource/java/ch/ethz/sis/filetransfer/ChunkInputStream.java

...d/source/java/ch/ethz/sis/filetransfer/ConsoleLogger.java

...va/ch/ethz/sis/filetransfer/DefaultChunkDeserializer.java

...java/ch/ethz/sis/filetransfer/DefaultChunkSerializer.java

...ch/ethz/sis/filetransfer/DefaultDeserializerProvider.java

...e/java/ch/ethz/sis/filetransfer/DefaultRetryProvider.java

...a/ch/ethz/sis/filetransfer/DefaultSerializerProvider.java

.../source/java/ch/ethz/sis/filetransfer/DownloadClient.java

...e/java/ch/ethz/sis/filetransfer/DownloadClientConfig.java

...java/ch/ethz/sis/filetransfer/DownloadClientDownload.java

...urce/java/ch/ethz/sis/filetransfer/DownloadException.java

...ce/java/ch/ethz/sis/filetransfer/DownloadInputStream.java

...a/ch/ethz/sis/filetransfer/DownloadInputStreamReader.java

.../source/java/ch/ethz/sis/filetransfer/DownloadItemId.java

.../ethz/sis/filetransfer/DownloadItemNotFoundException.java

...ava/ch/ethz/sis/filetransfer/DownloadListenerAdapter.java