Fix TridentNet batch inference bug (#4717)
Fix TridentNet batch inference bug (#4717)

* upd

* Update tridentnet_r50_caffe_1x_coco.py

* reformat

* Update tridentnet_r50_caffe_1x_coco.py

* Update trident_roi_head.py

* update
open-mmlab/mmdetection,open-mmlab/mmdetection