HDFS-9856. Suppress Jenkins warning for sample JSON file. Contributed by Xiaobing Zhou

hadoop-hdfs-project/hadoop-hdfs/pom.xml

@@ -396,6 +396,8 @@ http://maven.apache.org/xsd/maven-4.0.0.xsd">
             <exclude>src/main/webapps/static/json-bignum.js</exclude>
             <exclude>src/main/webapps/static/dataTables.bootstrap.css</exclude>
             <exclude>src/main/webapps/static/dataTables.bootstrap.js</exclude>
+            <exclude>src/test/resources/diskBalancer/data-cluster-3node-3disk.json</exclude>
+            <exclude>HDFS-1312_CHANGES.txt</exclude>
           </excludes>
         </configuration>
       </plugin>