These package groups are included in the Server DVD:
# Web Server environment @haproxy @mongodb @perl-web @python-web @php @rubyonrails @tomcat
However, I can't see why. None of them is uservisible, and none of them is in the optionlist for server-product-environment, which means they won't be offered as optional extra groups for it. That's the *only* environment group you can pick from the GUI in the Server DVD.
So, the only way you could use any of those is with a kickstart from the Server DVD, or I guess installing them post-install with yum if you don't have a network available. Is that the use case for them, or is this just an oversight? The comment makes it sound a bit like at some point the "Web Server" environment group was expected to be available, but it is not, the Server product is the only available env group on a Server DVD install.