Changed how the proto_descriptor file is specified.

To reflect: https://gerrit.opencord.org/#/c/15070/
Field is duplicated in order to be backwards-compatible for now.

Change-Id: Ib3a4dc272e2c203115e551885621852ce9d7a3ce
diff --git a/voltha/templates/afrouter-config.yaml b/voltha/templates/afrouter-config.yaml
index 3baf16a..eb2eba1 100644
--- a/voltha/templates/afrouter-config.yaml
+++ b/voltha/templates/afrouter-config.yaml
@@ -39,6 +39,7 @@
             "name": "vcore",
             "package": "voltha",
             "service": "VolthaService",
+            "proto_descriptor": "voltha.pb",
             "routes": [
               {
                 "name": "dev_manager",