Add author to class header

Author: youngsuk-kim

src/main/java/org/springframework/data/redis/cache/DefaultRedisCacheWriter.java

@@ -65,6 +65,7 @@
  * @author André Prata
  * @author John Blum
  * @author ChanYoung Joung
+ * @author Youngsuk Kim
  * @since 2.0
  */
 class DefaultRedisCacheWriter implements RedisCacheWriter {