HADOOP-16542. Update commons-beanutils version to 1.9.4. Contributed by kevin su.

Signed-off-by: Wei-Chiu Chuang <weichiu@apache.org>
(cherry picked from commit 38c1a10024476ae78975e4dc7d27a1524722b79d)

hadoop-project/pom.xml

@@ -953,7 +953,7 @@
       <dependency>
         <groupId>commons-beanutils</groupId>
         <artifactId>commons-beanutils</artifactId>
-        <version>1.9.3</version>
+        <version>1.9.4</version>
       </dependency>
       <dependency>
         <groupId>org.apache.commons</groupId>