gRPC migration update

Change-Id: Icdd1a824948fa994cd36bd121c962f5ecf74e3cf
diff --git a/vendor/github.com/json-iterator/go/stream.go b/vendor/github.com/json-iterator/go/stream.go
index 17662fd..23d8a3a 100644
--- a/vendor/github.com/json-iterator/go/stream.go
+++ b/vendor/github.com/json-iterator/go/stream.go
@@ -103,14 +103,14 @@
 	if stream.Error != nil {
 		return stream.Error
 	}
-	n, err := stream.out.Write(stream.buf)
+	_, err := stream.out.Write(stream.buf)
 	if err != nil {
 		if stream.Error == nil {
 			stream.Error = err
 		}
 		return err
 	}
-	stream.buf = stream.buf[n:]
+	stream.buf = stream.buf[:0]
 	return nil
 }
 
@@ -177,7 +177,6 @@
 func (stream *Stream) WriteMore() {
 	stream.writeByte(',')
 	stream.writeIndention(0)
-	stream.Flush()
 }
 
 // WriteArrayStart write [ with possible indention