Add header for files (#869)

* Add header for files

* Add header for files

* Add header for files

* Add header for files

tests/test_models/test_heads/test_pointnet2_decode_head.py

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

tests/test_models/test_heads/test_roi_extractors.py

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

tests/test_models/test_heads/test_semantic_heads.py

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

tests/test_models/test_necks/test_fpn.py

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

tests/test_models/test_necks/test_necks.py

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

tests/test_models/test_segmentors.py

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

tests/test_models/test_voxel_encoder/test_dynamic_scatter.py

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

tests/test_models/test_voxel_encoder/test_voxel_encoders.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import torch
 
 from mmdet3d.models.builder import build_voxel_encoder

tests/test_models/test_voxel_encoder/test_voxel_generator.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import numpy as np
 
 from mmdet3d.core.voxel.voxel_generator import VoxelGenerator

tests/test_models/test_voxel_encoder/test_voxelize.py

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

tests/test_runtime/test_apis.py

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

tests/test_runtime/test_config.py

+# Copyright (c) OpenMMLab. All rights reserved.
 from os.path import dirname, exists, join, relpath
 
 

tests/test_utils/test_anchors.py

+# Copyright (c) OpenMMLab. All rights reserved.
 """
 CommandLine:
     pytest tests/test_utils/test_anchor.py

tests/test_utils/test_assigners.py

+# Copyright (c) OpenMMLab. All rights reserved.
 """Tests the Assigner objects.
 
 CommandLine:

tests/test_utils/test_bbox_coders.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import torch
 
 from mmdet3d.core.bbox import DepthInstance3DBoxes, LiDARInstance3DBoxes

tests/test_utils/test_box3d.py

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

tests/test_utils/test_box_np_ops.py

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

tests/test_utils/test_coord_3d_mode.py

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

tests/test_utils/test_merge_augs.py

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

tests/test_utils/test_nms.py

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