Useful to generate a single image on-the-fly
and use it for scenario tests
(or simply useful for a refactor of the rest of the
build-images script).
Change-Id: Ica615e9e7d93b38fd12189a9f97d26ca62d84a3e
By default, use the variable that always point to the source code
of sahara-image-elements in the zuul environment. This makes it
possible to use the role in other projects without passing
the path to the source code of sahara-image-elements.
Change-Id: I29811eaa0d783d7b89ce1cb3f635de0c8f3e79e3
Luigi Toscano