[Fix] fix detr3d 'custom_import' error (#2260)

* fix 'custom_imports' in config files

* fix lint

projects/DETR3D/configs/detr3d_r101_gridmask.py

@@ -3,7 +3,7 @@ _base_ = [
     'mmdet3d::_base_/default_runtime.py'
 ]
 
-custom_imports = dict(imports=['projects.detr3d.detr3d'])
+custom_imports = dict(imports=['projects.DETR3D.detr3d'])
 # If point cloud range is changed, the models should also change their point
 # cloud range accordingly
 point_cloud_range = [-51.2, -51.2, -5.0, 51.2, 51.2, 3.0]

projects/DETR3D/configs/detr3d_r101_gridmask_cbgs.py

 _base_ = ['./detr3d_r101_gridmask.py']
 
-custom_imports = dict(imports=['projects.detr3d.detr3d'])
+custom_imports = dict(imports=['projects.DETR3D.detr3d'])
 # If point cloud range is changed, the models should also change their point
 # cloud range accordingly
 point_cloud_range = [-51.2, -51.2, -5.0, 51.2, 51.2, 3.0]

projects/DETR3D/configs/detr3d_vovnet_gridmask_trainval_cbgs.py

 _base_ = ['./detr3d_r101_gridmask_cbgs.py']
 
-custom_imports = dict(imports=['projects.detr3d.detr3d'])
+custom_imports = dict(imports=['projects.DETR3D.detr3d'])
 
 img_norm_cfg = dict(
     mean=[103.530, 116.280, 123.675],
@@ -35,5 +35,17 @@ train_dataloader = dict(
     dataset=dict(
         type='CBGSDataset',
         dataset=dict(ann_file='nuscenes_infos_trainval.pkl')))
+
+test_dataloader = dict(
+    dataset=dict(
+        data_root='data/nuscenes-test', ann_file='nuscenes_infos_test.pkl'))
+
+test_evaluator = dict(
+    type='NuScenesMetric',
+    data_root='data/nuscenes-test',
+    jsonfile_prefix='work_dirs/detr3d_vovnet_results_test',
+    format_only=True,
+    metric=[])
+
 load_from = 'ckpts/dd3d_det_final.pth'
 find_unused_parameters = True