Add back dj-database-url, need it for CI

requirements/test.txt

@@ -16,6 +16,7 @@ pytest-django==3.6.0
 pytest-cov==2.8.1
 
 # Test support
+dj-database-url==0.4.2
 django-autoslug==1.9.3
 django-bleach==0.3.0
 psycopg2==2.7.3.2

settings.py

@@ -1,3 +1,5 @@
+import dj_database_url
+
 DEBUG = True
 TEMPLATE_DEBUG = True
 
@@ -6,10 +8,7 @@ SECRET_KEY = 'this is my secret key'  # NOQA
 TEST_RUNNER = 'django.test.runner.DiscoverRunner'
 
 DATABASES = {
-    'default': {
-        'HOST': '127.0.0.1',
-        'NAME': 'localized_fields',
-    },
+    'default': dj_database_url.config(default='postgres:///psqlextra'),
 }
 
 DATABASES['default']['ENGINE'] = 'psqlextra.backend'