Use Horizon project template for django jobs

Horizon defined a project template 'horizon-non-primary-django-jobs'
for django jobs. This patch use that template to run django jobs
here. For information please refer [1]

[1] https://review.opendev.org/#/c/681969/

Change-Id: Ibae43a18da00224a213e0122cdd8974694c2d601

.zuul.yaml

@@ -1,17 +1,10 @@
 - project:
     templates:
       - check-requirements
+      - horizon-non-primary-django-jobs
       - openstack-cover-jobs-horizon
       - openstack-lower-constraints-jobs-horizon
       - openstack-python-jobs-horizon
       - openstack-python3-train-jobs-horizon
       - publish-openstack-docs-pti
       - release-notes-jobs-python3
-    check:
-      jobs:
-        - horizon-openstack-tox-python3-django111
-        - horizon-openstack-tox-python3-django22
-    gate:
-      jobs:
-        - horizon-openstack-tox-python3-django111
-        - horizon-openstack-tox-python3-django22