Modifications for Openshift

With these modifications the netbox containers can run on Openshift.
The configuration files can be imported from a config map to the
'/etc/netbox' directory and will be loaded from there.

docker-compose.test.yml

@@ -9,6 +9,8 @@ services:
       depends_on:
       - postgres
       env_file: netbox.env
+      volumes:
+      - ./configuration:/etc/netbox:ro
       command:
       - ./manage.py
       - test