Config fix (#2233)

configs/albu_example/mask_rcnn_r50_fpn_1x.py

configs/atss/atss_r50_fpn_1x.py

configs/carafe/faster_rcnn_r50_fpn_carafe_1x.py

configs/carafe/mask_rcnn_r50_fpn_carafe_1x.py

configs/cascade_mask_rcnn_r101_fpn_1x.py

configs/cascade_mask_rcnn_r50_fpn_1x.py

configs/cascade_mask_rcnn_x101_32x4d_fpn_1x.py

configs/cascade_mask_rcnn_x101_64x4d_fpn_1x.py

configs/cascade_rcnn_r101_fpn_1x.py

configs/cascade_rcnn_r50_fpn_1x.py

configs/cascade_rcnn_x101_32x4d_fpn_1x.py

configs/cascade_rcnn_x101_64x4d_fpn_1x.py

configs/cityscapes/faster_rcnn_r50_fpn_1x_cityscapes.py

configs/cityscapes/mask_rcnn_r50_fpn_1x_cityscapes.py

configs/dcn/cascade_mask_rcnn_dconv_c3-c5_r50_fpn_1x.py

configs/dcn/cascade_rcnn_dconv_c3-c5_r50_fpn_1x.py

configs/dcn/faster_rcnn_dconv_c3-c5_r50_fpn_1x.py

configs/dcn/faster_rcnn_dconv_c3-c5_x101_32x4d_fpn_1x.py

configs/dcn/faster_rcnn_dpool_r50_fpn_1x.py

configs/dcn/faster_rcnn_mdconv_c3-c5_group4_r50_fpn_1x.py