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: I70f79c2643202a53102f820b111faa7bd5b6f103

{{cookiecutter.repo_name}}/.zuul.yaml

@@ -1,11 +1,4 @@
 - project:
     templates:
       - horizon-nodejs10-jobs
-    check:
-      jobs:
-        - openstack-tox-py36:
-            voting: false
-        - horizon-openstack-tox-python3-django111
-    gate:
-      jobs:
-        - horizon-openstack-tox-python3-django111
+      - horizon-non-primary-django-jobs