The commit consists of:

1) Support metadata (e.g. get-depth) for rpc request.
2) Support parameters in rpc requests
3) Generate the code for netconf rpc to Voltha grpc mapping
4) Initial Support custom rpc requests (those defined in the voltha YANG schemas).

Change-Id: I24dc7fd75b5f71d0d8591637579672b25fda57ec
diff --git a/netconf/nc_rpc/ext/get_schemas.py b/netconf/nc_rpc/ext/get_schemas.py
index cc09ebb..094c8df 100644
--- a/netconf/nc_rpc/ext/get_schemas.py
+++ b/netconf/nc_rpc/ext/get_schemas.py
@@ -26,9 +26,9 @@
 
 class GetSchemas(Rpc):
     def __init__(self, request, request_xml, grpc_client, session, capabilities):
-        super(GetSchemas, self).__init__(request, request_xml, grpc_client, session)
+        super(GetSchemas, self).__init__(request, request_xml, grpc_client,
+                                         session, capabilities)
         self._validate_parameters()
-        self.capabilities = capabilities
 
     @inlineCallbacks
     def execute(self):