Run javadoc tests

[chingor13]

We're currently skipping javadoc tests when running CI.

We may also need to set up a conditional profile for Java 8 for the Xdoclint option.

[geri-m]

I think <doclint>none</doclint> is what we are looking for (https://maven.apache.org/plugins/maven-javadoc-plugin/javadoc-mojo.html#doclint). I'll give it a shot.

[geri-m]

JavaDoc generation triggered using JDK 7/8/11 looks okay. Currently I don't see a reason why to use a profile. @igorbernstein2 any comments or drawbacks you see here?

[igorbernstein2]

I didn't know about <doclint>. That's way better than my profile hack