This change adds a voting job that builds the airshipctl docker image on
each patch set. The same job will be updated in a later commit to
publish the image to the quay.io/airshipit/airshipctl repository.
Related #33
Change-Id: I202da62c77ec277312518fead09f0f3ef32ccde8
Signed-off-by: Drew Walters <andrew.walters@att.com>