Step 0. Clone LabelConversionModule:
git clone https://github.com/pablogvrcia/LabelConversionModule.git
Step 1. Execute it from the path where the labels the data is in MMDetection3D folder structure:
cd {path to mmdetection3d}/data/schwentine/training
./{path to LabelConversionModule}
cd {path to mmdetection3d}/data/schwentine/testing
./{path to LabelConversionModule}