[VOL-4292] OpenOLT Adapter changes for gRPC migration

Change-Id: I5af2125f2c2f53ffc78c474a94314bba408f8bae
diff --git a/vendor/go.etcd.io/etcd/clientv3/compare.go b/vendor/go.etcd.io/etcd/clientv3/compare.go
index 01ed68e..b5f0a25 100644
--- a/vendor/go.etcd.io/etcd/clientv3/compare.go
+++ b/vendor/go.etcd.io/etcd/clientv3/compare.go
@@ -15,7 +15,7 @@
 package clientv3
 
 import (
-	pb "go.etcd.io/etcd/etcdserver/etcdserverpb"
+	pb "github.com/coreos/etcd/etcdserver/etcdserverpb"
 )
 
 type CompareTarget int