SEBA-345: Upgrade to current gRPC and Protobuf libs

Change-Id: I7167a0a490e38cb40b8bd37da81bf78a8e3a86ea
diff --git a/netconf/grpc_client/grpc_client.py b/netconf/grpc_client/grpc_client.py
index bcfb972..45d3347 100644
--- a/netconf/grpc_client/grpc_client.py
+++ b/netconf/grpc_client/grpc_client.py
@@ -33,7 +33,7 @@
 
 from common.utils.asleep import asleep
 from netconf.protos import third_party
-from netconf.protos.schema_pb2 import SchemaServiceStub
+from netconf.protos.schema_pb2_grpc import SchemaServiceStub
 from google.protobuf.empty_pb2 import Empty
 from common.utils.consulhelpers import get_endpoint_from_consul
 # from netconf.protos.voltha_pb2 import VolthaLocalServiceStub, \