grub2-2.00-5 has changed.
Depending on the product the path to these may be /fedora/ or /redhat/ so just use whatever they were installed under.
live media isn't exactly the same as the Anaconda install media. Right now this amounts to needing a root= cmdline argument but in the future there may be other differences. This also reverts 5437557846 on the new copies of the templates.
5437557846
Brian C. Lane