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

Signed-off-by: Wei-Chiu Chuang <weichiu@apache.org>

hadoop-project/pom.xml

@@ -998,7 +998,7 @@
       <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>