message: Copy exponential_avg_factor attr in grappler
diff: @@ -885,6 +885,7 @@ void CopyFusedBatchNormAttributes(const NodeDef& fused_batch_norm,
  (*attr)["is_training"] = src_attr.at("is_training");
  (*attr)["data_format"] = src_attr.at("data_format");
  (*attr)["epsilon"] = src_attr.at("epsilon");
  + (*attr)["exponential_avg_factor"] = src_attr.at("exponential_avg_factor");
  // FusedBatchNormV2 and V3 have an extra type parameter.
  if (fused_batch_norm.op() != "FusedBatchNorm") {
  