Downgrade javadoc plugin to avoid classpath errors

Author: joelittlejohn

pom.xml

@@ -102,7 +102,7 @@
                 </plugin>
                 <plugin>
                     <artifactId>maven-javadoc-plugin</artifactId>
-                    <version>3.10.0</version>
+                    <version>2.10.4</version>
                 </plugin>
                 <plugin>
                     <artifactId>maven-plugin-plugin</artifactId>
@@ -231,8 +231,7 @@
             <plugin>
                 <artifactId>maven-javadoc-plugin</artifactId>
                 <configuration>
-                    <source>8</source>
-                    <doclint>all,-missing</doclint>
+                    <additionalparam>-Xdoclint:none</additionalparam>
                 </configuration>
                 <executions>
                     <execution>