Add header for files (#869)

* Add header for files

* Add header for files

* Add header for files

* Add header for files

tests/test_metrics/test_kitti_eval.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import numpy as np
 import pytest
 import torch

tests/test_metrics/test_losses.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import pytest
 import torch
 from torch import nn as nn

tests/test_metrics/test_seg_eval.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import numpy as np
 import pytest
 import torch

tests/test_models/test_backbones.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import numpy as np
 import pytest
 import torch

tests/test_models/test_common_modules/test_middle_encoders.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import pytest
 import torch
 

tests/test_models/test_common_modules/test_paconv_modules.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import numpy as np
 import pytest
 import torch

tests/test_models/test_common_modules/test_paconv_ops.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import pytest
 import torch
 

tests/test_models/test_common_modules/test_pointnet_modules.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import numpy as np
 import pytest
 import torch

tests/test_models/test_common_modules/test_pointnet_ops.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import pytest
 import torch
 

tests/test_models/test_common_modules/test_roiaware_pool3d.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import pytest
 import torch
 

tests/test_models/test_common_modules/test_sparse_unet.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import torch
 
 from mmdet3d.ops import SparseBasicBlock

tests/test_models/test_common_modules/test_vote_module.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import torch
 
 

tests/test_models/test_detectors.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import copy
 import numpy as np
 import pytest

tests/test_models/test_forward.py

+# Copyright (c) OpenMMLab. All rights reserved.
 """Test model forward process.
 
 CommandLine:

tests/test_models/test_fusion/test_fusion_coord_trans.py

+# Copyright (c) OpenMMLab. All rights reserved.
 """Tests coords transformation in fusion modules.
 
 CommandLine:

tests/test_models/test_fusion/test_point_fusion.py

+# Copyright (c) OpenMMLab. All rights reserved.
 """Tests the core function of point fusion.
 
 CommandLine:

tests/test_models/test_fusion/test_vote_fusion.py

+# Copyright (c) OpenMMLab. All rights reserved.
 """Tests the core function of vote fusion.
 
 CommandLine:

tests/test_models/test_heads/test_heads.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import copy
 import numpy as np
 import pytest

tests/test_models/test_heads/test_paconv_decode_head.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import numpy as np
 import pytest
 import torch

tests/test_models/test_heads/test_parta2_bbox_head.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import pytest
 import torch
 from mmcv import Config