VOL-1643 Update voltha-go to use voltha-protos and voltha-lib-go v3.0.0

Change-Id: I86744943d59de38e9285ed7f53adc49c3b047e62
diff --git a/db/model/branch.go b/db/model/branch.go
index 21669a1..2066643 100644
--- a/db/model/branch.go
+++ b/db/model/branch.go
@@ -19,7 +19,7 @@
 import (
 	"sync"
 
-	"github.com/opencord/voltha-lib-go/v2/pkg/log"
+	"github.com/opencord/voltha-lib-go/v3/pkg/log"
 )
 
 // TODO: implement weak references or something equivalent