This reverts commit fb21586abfff8f189459f4efde6eff2a6c637fe7.

Moving mgainstaller module to 50-59 range causes more harm and unwanted side
effects than it fixes.

This move makes drakx-installer-images to build with dracut >= 109-4.mga10 and
without network-legacy dracut module and without dhclient.

And according to upstream:
Range 00-09, 50-59 and 90-99 are reserved for out of tree (3rd party) dracut
modules. It is strongly recommended to use the 50-59 range for out of tree
dracut modules. Range 90-99 are reserved for unusual dracut customizations for
completeness, but using range 90-99 is not recommended for out of tree dracut
modules.

Not using the 50-59 range for out of tree dracut modules will likely lead to
unintended errors in the initramfs generation process as your dracut module
will either run too early or too late in the generaiton process. You have been
warned.

We want to eject the Live media on shutdown if draklive-install has
been run, to ensure the machine reboots into the newly installed
system. The code to do this was lost when it was moved from svn to
git.