[Fedora-spins] FYI: comps tweaks

[Bill Nottingham]

It was discovered that 'yum groupinstall <groupid>' or 'yum groupinstall
<group name>' would install either the package group *or* an environment
group that matched. Given the potential confusion that this can (and did)
cause for users, I've gone ahead and:

- renamed environment groups to <foo>-environment
- tweaked the group names of some of the package groups

so that we don't have any ID or name collisions. This shouldn't affect the
spins as I didn't rename any package groups used in spins, but sending here
just to inform everyone.

(Git 29d7e945 and ce229604, FWIW.)

Bill