CORD-2939 set device_type for OLTDevice

Change-Id: I956284d7f19d6e765e9878b95a6eecd0c4593897
diff --git a/roles/test-subscriber-config/templates/test-subscriber.yaml.j2 b/roles/test-subscriber-config/templates/test-subscriber.yaml.j2
index d82ee36..d8f453d 100644
--- a/roles/test-subscriber-config/templates/test-subscriber.yaml.j2
+++ b/roles/test-subscriber-config/templates/test-subscriber.yaml.j2
@@ -60,6 +60,7 @@
         name: volt-1
         host: 8.8.8.8
         port: 2194
+        device_type: simulated_olt
       requirements:
         - volt_service:
             node: service#volt