server DVD: re-add minimal and Server environments

the Server environment itself is not actually included in F24
and Rawhide Server DVDs ATM, only 'Infrastructure Server' and
'Web Server' show up in the environment list.

This should bring back the official Server product environment
and also minimal, which were both on the F23 DVD. QA would like
to have minimal still be here because it helps with openQA, but
if Server WG would prefer not to have it, we can take it out.

This also restores the F23 display order, with minimal first,
Server second, Web Server third, Infrastructure Server fourth.
Again minimal being at the top is convenient for QA for silly
reasons, but this can be changed if desired (putting Server at
the top). Anaconda should still select Server as the default
even though it isn't at the top.

@sgallagh thoughts? (also, does @ tagging people work in pagure? let's see!)

to explain the openQA thing: a bunch of the openQA tests are what we call 'generic' tests, i.e. installer tests we could run on any working installer image. We like to run these on the Server DVD if possible, because it runs fast and avoids unnecessary network traffic as all the packages are available from the DVD. However, most of the tests are set up to pick the 'minimal' package set, again to make sure they run fast, so things break if that's not available.

If we don't have minimal on the Server DVD we'd have to either make the tests smarter about environment selection or just always use the default env (which isn't always optimal), and we'd also have a trade-off between using a netinst image for the 'universal' tests (smaller package set to install, but network traffic) and using the Server DVD (no network traffic, but larger package set).

Filed an RHBZ for blocker tracking: #1315515

I just revised this to only add Server and re-order the other two choices for now so it's immediately mergeable to fix the lacking Server environment (which is kinda urgent). We can discuss whether Server WG wants minimal included or not on the ML.

Please actually remove the "Infrastructure Server" and "Web Server" environment groups. Those should not have been on F23 either, but they showed up because their package groups just happened to be satisfied. What we want people to be doing is installing the Server environment and optionally those other package groups.

As for minimal, I agree that requires discussion. (It's been discussed in the past, but no decision was made because the automatic inclusion of it based on the package group being satisfied made the decision moot).

okay, I'll adjust to take those out.