Grub2 grub_user fix

[trevor-vaughan]

The user generation script was incorrectly outputting additional
erronous information

[coveralls]

Coverage remained the same at 95.402% when pulling dbc070f on trevor-vaughan:grub2_user_fix into ce7389d on hercules-team:master.

[jeannegreulich]

When you call the puppetx::augeasprovidersGrub::grub2_cfg to find the grub.cfg file it takes the first one it finds. Suggest you add a check for /sys/firmware/efi and if efi, get only the efi files and visa versa. Someone might go in and erroneaulsy edit or create a /boot/grub2 config file and they will be hosed. Also why include /boot/grub/grub.cfg since that is only grub not grub2?

Also, name the file in grub.d something so it will get included after 01_users because the superuser setting from 01_users will win if it is later in the grub file.

[jeannegreulich]

I reviewed these and tested them out on a system and they work.

[olifre]

Also why include /boot/grub/grub.cfg since that is only grub not grub2?

Since that's what Ubuntu uses for Grub2 configuration.
This removal, which was not documented in the commit message, has broken at least Ubuntu (maybe also Debian).

Grub1 would use menu.lst which is completely unrelated to the files looked for here.

See #36 for my fixup PR.