Disable doclint error checking

Introduction of DocLint in Java 8 results in strict error checking in
JavaDocs.  What were previously on warnings on JavaDoc generation now
results in errors.  This is causing issues when using the apache release
plugin.  Disabling doclint error checking for the time being.

pom.xml

@@ -77,6 +77,7 @@
       <skipRestTests>true</skipRestTests>
       <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
       <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+      <additionalparam>-Xdoclint:none</additionalparam>
 
      <!--
 
@@ -648,6 +649,7 @@
             <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-javadoc-plugin</artifactId>
+               
                <version>2.9</version>
             </plugin>
             <plugin>