fixup! Django 2.0

Author: jpic

pytest_django/plugin.py

@@ -442,9 +442,10 @@ def _django_set_urlconf(request):
         skip_if_no_django()
         import django.conf
         try:
-            from django.core.urlresolvers import clear_url_caches, set_urlconf
-        except ImportError:
             from django.urls import clear_url_caches, set_urlconf
+        except ImportError:
+            # Removed in Django 2.0
+            from django.core.urlresolvers import clear_url_caches, set_urlconf
 
         validate_urls(marker)
         original_urlconf = django.conf.settings.ROOT_URLCONF