[CORD-2930] Pulling OLT Devices from VOLTHA

Change-Id: Ieb28b92da3c67b4fc562d42e29b0e58aec6d7be9
diff --git a/xos/unittest.cfg b/xos/unittest.cfg
index 71be7ca..44c6ea4 100644
--- a/xos/unittest.cfg
+++ b/xos/unittest.cfg
@@ -3,3 +3,4 @@
 code-directories=synchronizer
                  model_policies
                  steps
+                 pull_steps