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: I09a70fc9c54818f99578cddc9fd38f0faeea8c3f

.zuul.yaml

@@ -2,6 +2,7 @@
     templates:
       - openstack-lower-constraints-jobs-horizon
       - check-requirements
+      - horizon-non-primary-django-jobs
       - horizon-nodejs10-jobs
       - openstack-python-jobs-horizon
       - publish-openstack-docs-pti
@@ -12,7 +13,3 @@
             voting: false
             required-projects:
               - openstack/horizon
-        - horizon-openstack-tox-python3-django111
-    gate:
-      jobs:
-        - horizon-openstack-tox-python3-django111

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = pep8,py27-local,py3-dj111-local,eslint,karma-local,docs-local,releasenotes,lower-constraints-local
+envlist = pep8,py27-local,py3-{dj111,dj22},eslint,karma-local,docs-local,releasenotes,lower-constraints-local
 minversion = 2.3.2
 skipsdist = True
 
@@ -16,7 +16,10 @@ deps =
   -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/raw/branch/master/upper-constraints.txt}
   -r{toxinidir}/requirements.txt
   -r{toxinidir}/test-requirements.txt
-commands = python manage.py test {posargs}
+commands =
+  dj111: pip install django>=1.11,<2
+  dj22: pip install django>=2.2,<2.3
+  python manage.py test {posargs}
 
 # For installation of horizon on local
 # NOTICE: this tox.ini requires horizon repository cloned in sibling directory.
@@ -61,19 +64,6 @@ commands =
   {[testenv:hz-local]commands}
   {[testenv]commands}
 
-[testenv:py3-dj111]
-basepython = python3
-commands =
-  pip install django>=1.11,<2
-  {[testenv]commands}
-
-[testenv:py3-dj111-local]
-basepython = python3
-commands =
-  {[testenv:hz-local]commands}
-  pip install django>=1.11,<2
-  {[testenv]commands}
-
 [testenv:eslint]
 basepython = python3
 whitelist_externals =