generate stdout and stderr log path

def get_log_path(config_file_name):
    '''generate stdout and stderr log path'''
    stdout_full_path = os.path.join(NNICTL_HOME_DIR, config_file_name, 'stdout')
    stderr_full_path = os.path.join(NNICTL_HOME_DIR, config_file_name, 'stderr')
    return stdout_full_path, stderr_full_path