Fedora: Don't install qemu stuff.

Shouldn't be needed ATM for ceph-deploy stuff and it installing
ceph-libs is conflicting with ceph-deploy installing ceph.

Signed-off-by: Sandon Van Ness <sandon@inktank.com>
Redhat: Don't specify qemu version

Looks like we finally have some identifiers in our qemu packages
and with repopriority being set we should no longer have to
specify a specific version unless we want a different default
which at the moment appears to be the cuttlefish.async ones.

Signed-off-by: Sandon Van Ness <sandon@inktank.com>