[VOL-4290] Voltha go library updates for gRPC migration

Change-Id: I1aa2774beb6b7ed7419bc45aeb53fcae8a8ecda0
diff --git a/vendor/go.etcd.io/etcd/embed/util.go b/vendor/go.etcd.io/etcd/embed/util.go
index 40f3ce9..168e031 100644
--- a/vendor/go.etcd.io/etcd/embed/util.go
+++ b/vendor/go.etcd.io/etcd/embed/util.go
@@ -17,7 +17,7 @@
 import (
 	"path/filepath"
 
-	"go.etcd.io/etcd/wal"
+	"github.com/coreos/etcd/wal"
 )
 
 func isMemberInitialized(cfg *Config) bool {
@@ -25,5 +25,6 @@
 	if waldir == "" {
 		waldir = filepath.Join(cfg.Dir, "member", "wal")
 	}
+
 	return wal.Exist(waldir)
 }