[VOL-3069]Pass Context down the execution call hierarchy across voltha codebase

Change-Id: I97a2630d9a4fe5dc3161113539edda476534f186
diff --git a/db/model/proxy.go b/db/model/proxy.go
index 997ebe4..5aa8940 100644
--- a/db/model/proxy.go
+++ b/db/model/proxy.go
@@ -38,7 +38,7 @@
 }
 
 // NewProxy instantiates a new proxy to a specific location
-func NewProxy(kvStore *db.Backend, path string) *Proxy {
+func NewProxy(ctx context.Context, kvStore *db.Backend, path string) *Proxy {
 	if path == "/" {
 		path = ""
 	}