[VOL-3187]Pass Context down the execution call hierarchy across voltha-go codebase

Change-Id: I6bc2a0f7226c1beed4ae01a15d7b5c4dc04358d8
diff --git a/rw_core/core/device/flow/loader.go b/rw_core/core/device/flow/loader.go
index 25060ab..3d9f065 100644
--- a/rw_core/core/device/flow/loader.go
+++ b/rw_core/core/device/flow/loader.go
@@ -60,7 +60,7 @@
 
 	var flows []*ofp.OfpFlowStats
 	if err := loader.dbProxy.List(ctx, &flows); err != nil {
-		logger.Errorw("failed-to-list-flows-from-cluster-data-proxy", log.Fields{"error": err})
+		logger.Errorw(ctx, "failed-to-list-flows-from-cluster-data-proxy", log.Fields{"error": err})
 		return
 	}
 	for _, flow := range flows {