Fixed to flush pending buffers when closing

Signed-off-by: Tsuyoshi Ozawa <[email protected]>

Author: oza

src/main/java/org/fluentd/logger/FluentLogger.java

@@ -108,6 +108,7 @@ public void flush() {
 
     public void close() {
         if (sender != null) {
+            sender.flush();
             sender.close();
             sender = null;
         }