VOL-1900 lint warning fixes db

Change-Id: Iaa4e5c271c9e1d7c8ebce1e13c7e723ea4762304
diff --git a/db/model/branch.go b/db/model/branch.go
index 957e0ca..21669a1 100644
--- a/db/model/branch.go
+++ b/db/model/branch.go
@@ -17,8 +17,9 @@
 package model
 
 import (
-	"github.com/opencord/voltha-lib-go/v2/pkg/log"
 	"sync"
+
+	"github.com/opencord/voltha-lib-go/v2/pkg/log"
 )
 
 // TODO: implement weak references or something equivalent