Update get_root_logger API

.isort.cfg

@@ -3,6 +3,6 @@ line_length = 79
 multi_line_output = 0
 known_standard_library = setuptools
 known_first_party = mmdet,mmdet3d
-known_third_party = cv2,load_scannet_data,matplotlib,mmcv,numba,numpy,nuscenes,plyfile,pycocotools,pyquaternion,pytest,scannet_utils,scipy,seaborn,shapely,skimage,sunrgbd_utils,terminaltables,torch,torchvision,trimesh
+known_third_party = cv2,load_scannet_data,lyft_dataset_sdk,matplotlib,mmcv,numba,numpy,nuscenes,pandas,plyfile,pycocotools,pyquaternion,pytest,scannet_utils,scipy,seaborn,shapely,skimage,sunrgbd_utils,terminaltables,torch,torchvision,trimesh
 no_lines_before = STDLIB,LOCALFOLDER
 default_section = THIRDPARTY

mmdet3d/utils/__init__.py

 from mmcv.utils import Registry, build_from_cfg, print_log
 
-from mmdet import get_root_logger
+from mmdet.utils import get_root_logger
 from .collect_env import collect_env
 
 __all__ = [