Moving all references to proto v4

Change-Id: Idbb9119da7ddae136f7ffbbb783429c7e049b3ab
diff --git a/go/omci/omci_mib_db.pb.go b/go/omci/omci_mib_db.pb.go
index a3f23af..d644bf8 100644
--- a/go/omci/omci_mib_db.pb.go
+++ b/go/omci/omci_mib_db.pb.go
@@ -6,7 +6,7 @@
 import (
 	fmt "fmt"
 	proto "github.com/golang/protobuf/proto"
-	_ "github.com/opencord/voltha-protos/v3/go/common"
+	_ "github.com/opencord/voltha-protos/v4/go/common"
 	math "math"
 )
 
@@ -475,42 +475,42 @@
 
 var fileDescriptor_4fa402a2df36dcc1 = []byte{
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