If GRUB2 is not available in the system a fallback to install Extlinux
will happen. This patch also allows you to enforce the use of Extlinux
exporting the DIB_EXTLINUX variable.
Change-Id: I88fa792a0bd19cacca167134f2054b11c807a451
Flavour is overloaded in openstack due to it being used by nova. Element
seems to have the same feeling of combinability without using a term already
in active use in the openstack community.
Change-Id: Ia4c028d4062a8f69c66665821c94dd4bcdf06031
