Skip Lint of JavaDoc (#525)

* Use doclint to skip checks of javadoc (#524)

* Remove comment out command (#522)

Author: geri-m

.kokoro/build.sh

@@ -23,5 +23,5 @@ echo $JOB_TYPE
 
 export MAVEN_OPTS="-Xmx1024m -XX:MaxPermSize=128m"
 
-mvn install -DskipTests=true -Dmaven.javadoc.skip=true -B -V
+mvn install -DskipTests=true -B -V
 mvn test -B

pom.xml

@@ -384,7 +384,7 @@
       <plugin>
         <artifactId>maven-javadoc-plugin</artifactId>
         <configuration>
-          <additionalOptions>-Xdoclint:none</additionalOptions>
+          <doclint>none</doclint>
         </configuration>
         <executions>
           <execution>