Horizon defined a project template 'horizon-non-primary-django-jobs'
for django jobs. This patch use that template to run django jobs
here and also fixes failed test cases for django2.2 support.
For information please refer [1]
[1] https://review.opendev.org/#/c/681969/
Change-Id: I3ab81402633b9abe39e49c3921585db992050540