Move train_cfg/test_cfg into model

[xvjiarui]

No description provided.

[codecov]

Codecov Report

Merging #4347 (81922a4) into master (0c84b65) will increase coverage by 0.11%.
The diff coverage is 33.33%.

@@            Coverage Diff             @@
##           master    #4347      +/-   ##
==========================================
+ Coverage   61.88%   61.99%   +0.11%     
==========================================
  Files         240      241       +1     
  Lines       18267    18357      +90     
  Branches     3058     3075      +17     
==========================================
+ Hits        11304    11381      +77     
- Misses       6416     6419       +3     
- Partials      547      557      +10     

Flag	Coverage Δ
unittests	61.96% <33.33%> (+0.11%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
mmdet/apis/inference.py	19.76% <0.00%> (+0.22%)	⬆️
mmdet/core/export/pytorch2onnx.py	17.39% <0.00%> (-0.39%)	⬇️
mmdet/models/builder.py	93.93% <60.00%> (-6.07%)	⬇️
mmdet/core/post_processing/bbox_nms.py	83.05% <0.00%> (-2.92%)	⬇️
mmdet/core/bbox/samplers/sampling_result.py	73.01% <0.00%> (-1.59%)	⬇️
mmdet/models/roi_heads/test_mixins.py	45.03% <0.00%> (-0.70%)	⬇️
mmdet/datasets/voc.py	25.00% <0.00%> (-0.59%)	⬇️
mmdet/models/dense_heads/cascade_rpn_head.py	28.07% <0.00%> (-0.20%)	⬇️
mmdet/models/dense_heads/atss_head.py	27.94% <0.00%> (ø)
mmdet/ops/__init__.py
... and 9 more

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[ZwwWayne]

LGTM, see if @hellock has any comments.

[xvjiarui]

Kindly ping @hellock

[ZwwWayne]

1. We also need to update documentation about configs, including the config examples.
2. Add deprecation notification in the documentation about configs.

[hhaAndroid]

@xvjiarui I tested all models using batch_test.py without checkpoint and find missed modifying the following configuration：

1 configs/faster_rcnn/faster_rcnn_r50_fpn_soft_nms_1x_coco.py
2 configs/faster_rcnn/faster_rcnn_r50_fpn_ohem_1x_coco.py
3 configs/lvis/mask_rcnn_r50_fpn_sample1e-3_mstrain_1x_lvis_v1.py
4 configs/lvis/mask_rcnn_r50_fpn_sample1e-3_mstrain_2x_lvis_v0.5.py