The preparation to call zipl and the call itself were wrong.
For whatever reason the kernel image the initrd are moved
to another location prior to calling zipl. That move broke
the system because no kernel/initrd existed at the expected
place anymore. In addition the zipl call itself was issued
from a the wrong directory. Also no config file was written
as an after effect of the refactoring in Issue #1194. This
Fixes#1173 and bsc#1156694
Fedora now uses a BLS configuration by default, but this is not supported
by all distributions. So check if is supported by the grub2-mkconfig tool
and only enable the option if that's the case.
Fixes: #1248
