My comments above didn't render.

`<!-- Uncomment the following block to test the CDI decorators feature -->
<!-- <decorators>
     <class>org.jboss.as.quickstarts.cdi.decorator.StaffServiceDecorator</class>
</decorators> -->`

No, I don't think we have to explain how to comment XML files. I just think it's easier and less error prone to remove beginning `<!--` and ending `-->` comment markers that to remove them from within the tags.

I also think it's good to be consistent in the way we do things across all the files in all the quickstarts to make them easier for developers to follow and also make them look more polished. 

Anyway, it was just a suggestion. I didn't many any offense.