WS-1518: clean up; add flush

Author: Katsuya-Tomioka

api/src/main/java/com/basistech/rosette/api/HttpRosetteAPI.java

@@ -162,15 +162,14 @@ private static byte[] getBytes(InputStream is) throws IOException {
         ByteArrayOutputStream out = new ByteArrayOutputStream();
 
         byte[] buf = new byte[4096];
-        long total = 0;
 
         while (true) {
             int r = is.read(buf);
             if (r == -1) {
+                out.flush();
                 return out.toByteArray();
             }
             out.write(buf, 0, r);
-            total += (long)r;
         }
     }