Set the MAMLMO_XSD_PATH environment variable in current process.

def set_malmo_xsd_path():
    """Set the MAMLMO_XSD_PATH environment variable in current process."""
      
    os.environ["MALMO_XSD_PATH"] = str(pathlib.Path(malmo_install_dir + "/Schemas").absolute())
    print(os.environ["MALMO_XSD_PATH"])