Created by: guoshengCS

Since I am implementing caffe2paddle model converter and the saved models are related to layer name, I noticed this problem. paddle.v2.layer.img_conv will get default layer name __img_conv_layer__XXX, but paddle.v2.networks.img_conv_group which implicitly uses paddle.trainer_config_helpers.layers.img_conv_layer will get default layer name __conv__XXX. This might be the reason that __convert_to_v2__ use wrap_name_default(name_prefix=method_name) to wrap while paddle.trainer_config_helpers.layers.img_conv_layer use wrap_name_default("conv"). Is it possible to get the default layer name in V1 and use this to wrap V2 layer name, and is it necessary to fix this.