[CORD-3092][CORD-3042] Autogenerate c_tag for subscriber

Change-Id: I2f8eaf3fcd3ef1148e0070c307177c60ee79d6a1
diff --git a/xos/unittest.cfg b/xos/unittest.cfg
index 71be7ca..b434628 100644
--- a/xos/unittest.cfg
+++ b/xos/unittest.cfg
@@ -3,3 +3,4 @@
 code-directories=synchronizer
                  model_policies
                  steps
+                 models