feat(edit filename): Widen/fine-uploader#773 - update server-side Java example
feat(edit filename): Widen/fine-uploader#773 - update server-side Java example

FineUploader/server-examples,paul-herrmann/server-examples,FineUploader/server-examples,paul-herrmann/server-examples,paul-herrmann/server-examples,paul-herrmann/server-examples,FineUploader/server-examples,paul-herrmann/server-examples,FineUploader/server-examples,paul-herrmann/server-examples,paul-herrmann/server-examples,FineUploader/server-examples,FineUploader/server-examples,paul-herrmann/server-examples,FineUploader/server-examples,FineUploader/server-examples