HADOOP-17661. mvn versions:set fails to parse pom.xml. (#2956)

Signed-off-by: Akira Ajisaka <aajisaka@apache.org>

Change-Id: I7de255cb9a167e3a5e25ae339b050e82cb4b7c30
(cherry picked from commit 64264d726d81c919d3f682228ff4bd7fe349fcae)

hadoop-project/pom.xml

@@ -1844,11 +1844,12 @@
               <fork>true</fork>
               <source>${javac.version}</source>
               <target>${javac.version}</target>
-              <compilerArguments>
-                <Xlint/>
-				<Xlint:-unchecked/>
-                <Xmaxwarns>9999</Xmaxwarns>
-              </compilerArguments>
+              <compilerArgs>
+                <arg>-Xlint</arg>
+                <arg>-Xlint:unchecked</arg>
+                <arg>-Xmaxwarns</arg>
+                <arg>9999</arg>
+              </compilerArgs>
             </configuration>
           </plugin>
         </plugins>