Created attachment 779931 [details]
Patch to make grub2-once sysconf parsing more permissive

grub2-once parses /etc/sysconfig/bootloader to determine value of LOADER_TYPE
variable. However the regular expression there assumes that loader type has to
have quotes around the value which is not always the case (generally
assignments are treated the same way as in shell). This causes failure of
grub2-once when used on openstack instances.

I suggest the regexp should be more permissive to allow but not require quotes.
Something like attached patch.