In the 51-grub hook, after the GRUB installation, the script will look
for a GRUB configuration file and in case it's not present one will
be generated using the grub-mkconfig command. The reason why it have
to be done is because the new Fedora 19 cloud images is using extlinux
by default.
Change-Id: I80b15b3122698d98ac4d47dc06faf5909a90ab00
Setting up a routine to run at first time the system boot may vary from
distribution to distribution. This patch will remove the logic from the
diskimage-builder code and put it into the elements.
The base element will now deploy a dib-first-boot script and each OS
element will ensure that this script runs at rc.local time. By doing
that we will put the OS specific stuff in the OS elements and remove
the embedded code out of the img-function file.
Change-Id: I24c5d1b1185de5693f145347fe912245f1ba7dfe