Order the backend services according to their dependencies

Backend services have internal dependencies, so it’s better to start them in the correct order. Supervisord does not guarantee this order, but it’s still better than starting them all at once.

See: https://openbuildservice.org/help/manuals/obs-admin-guide/obs.cha.installation_and_configuration.html#_backend_installation

docker/services/backend/obsclouduploadserver.conf

@@ -4,7 +4,7 @@ directory=/usr/lib/obs/server/
 stdout_logfile=/srv/obs/log/clouduploadserver.log
 redirect_stderr=true
 autostart=True
-priority=1
+priority=20
 startretries=100
 stopsignal=KILL
 killasgroup=true