gRPC migration update

Change-Id: Icdd1a824948fa994cd36bd121c962f5ecf74e3cf
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