Update xos_config

with new backoff_disabled option
diff --git a/xos/xos_config b/xos/xos_config
index 1533542..a618905 100644
--- a/xos/xos_config
+++ b/xos/xos_config
@@ -32,6 +32,7 @@
 ca_ssl_cert=/etc/ssl/certs/ca-certificates.crt
 
 [observer]
+backoff_disabled=False
 images_directory=/opt/xos/images
 dependency_graph=/opt/xos/model-deps
 logfile=/var/log/xos_backend.log