[VOL-1499] Use precreated topic

This commit migrate from dynamically created kafka topic to
pre-created topic.  The changes are made in the rw_core, simulated
onu and olt adapters, and ponsim olt and onu adapters.
TODO: move the python shared library changes into the pyvoltha
repo.

Change-Id: Ia92287ec74009872e694aa22eb896d8a6487d231
diff --git a/common/core/northbound/grpc/default_api_handler.go b/common/core/northbound/grpc/default_api_handler.go
index 0cc76c5..30320a2 100644
--- a/common/core/northbound/grpc/default_api_handler.go
+++ b/common/core/northbound/grpc/default_api_handler.go
@@ -42,6 +42,11 @@
 	return nil, errors.New("UnImplemented")
 }
 
+func (handler *DefaultAPIHandler) UpdateMembership(ctx context.Context, membership *voltha.Membership) (*empty.Empty, error) {
+	log.Debugw("UpdateMembership-request", log.Fields{"membership": membership})
+	return nil, errors.New("UnImplemented")
+}
+
 func (handler *DefaultAPIHandler) GetVoltha(ctx context.Context, empty *empty.Empty) (*voltha.Voltha, error) {
 	log.Debug("GetVoltha-request")
 	return nil, errors.New("UnImplemented")