Let pytest-django find the project automatically

Add manage.py, as it seems to be required to fix the discovery of tests

manage.py

@@ -0,0 +1,11 @@
+#!/usr/bin/env python
+
+import os
+import sys
+
+if __name__ == "__main__":
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "tests.settings")
+
+    from django.core.management import execute_from_command_line
+
+    execute_from_command_line(sys.argv)

setup.cfg

@@ -1,5 +1,5 @@
 [tool:pytest]
-django_find_project = false
+testpaths = tests
 addopts = --cov django_hosts --cov-append --cov-report=xml --cov-report term-missing
 DJANGO_SETTINGS_MODULE = tests.settings