invalid filename format when running testing pipeline

[sus17]

In your latest commit, there is a bug in scripts/benchmark_3dmatch.py, line 175, saying:

• traj = read_trajectory(os.path.join(source_path, set_name + "_gt.log"))

However, there isn't any groundtruth log in testing dataset whose name ends with "_gt.log". After checking the testing dataset filename format, the code above will work if modified like this:

• traj = read_trajectory(os.path.join(source_path, set_name + "-evaluation/gt.log"))

Maybe the testing dataset structure has been changed. Could you inspect it if possible?