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: If66f8edc7208b406d39cce90d22be53dd7e21301

.zuul.yaml

@@ -1,5 +1,6 @@
 - project:
     templates:
+      - horizon-non-primary-django-jobs
       - openstack-python-jobs
       - openstack-python3-train-jobs
       - check-requirements

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py37,py27dj18,pep8
+envlist = py27,py37,py3-{dj111,dj22},pep8
 minversion = 1.6
 skipsdist = True
 
@@ -12,7 +12,10 @@ setenv = VIRTUAL_ENV={envdir}
          PYTHONHASHSEED=0
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
-commands = {toxinidir}/manage.py test karbor_dashboard --settings=karbor_dashboard.test.settings
+commands =
+   dj111: pip install django>=1.11,<2
+   dj22: pip install django>=2.2,<2.3
+   {toxinidir}/manage.py test karbor_dashboard --settings=karbor_dashboard.test.settings
 
 [testenv:pep8]
 basepython = python3
@@ -28,11 +31,6 @@ commands = {posargs}
 basepython = python3
 commands = /bin/bash run_tests.sh -N --no-pep8 --coverage {posargs}
 
-[testenv:py27dj18]
-basepython = python2.7
-commands = pip install django>=1.8,<1.9
-           /bin/bash run_tests.sh -N --no-pep8 {posargs}
-
 [testenv:py27integration]
 basepython = python2.7
 commands = /bin/bash run_tests.sh -N --integration --selenium-headless {posargs}