Moving all references to proto v4

Change-Id: Idbb9119da7ddae136f7ffbbb783429c7e049b3ab
diff --git a/protos/voltha_protos/meta.proto b/protos/voltha_protos/meta.proto
index 2eaee4d..2255e38 100644
--- a/protos/voltha_protos/meta.proto
+++ b/protos/voltha_protos/meta.proto
@@ -17,7 +17,7 @@
 
 syntax = "proto3";
 
-option go_package = "github.com/opencord/voltha-protos/v3/go/common";
+option go_package = "github.com/opencord/voltha-protos/v4/go/common";
 option java_package = "org.opencord.voltha.common";
 
 package voltha;