Created by: cryoco

PR types

Others

PR changes

Others

Describe

1. Add unittests and op version registry for tensorrt_subgraph_pass;
2. Fix bug: softmax op converter results diff, by adding support for attr axis;
3. Fix bug: layer_norm op converter results diff, by fixing the wrongly set feature size;
4. conv2d padded in SAME mode has problem in paddle-TRT, disable its converting for now;
5. instance_norm op has little diff between GPU and TRT, adjust its unittest diff threshold to 1e-4.