Document how to display test results in an ordered order with pytest-sugar

[ssbarnea]

I really love pytest-sugar and there is only one thing I wish it could be changed, even if is likely not sugar itself but more of interaction with pytest itself and xdist.

I would wish to be able to make the display of results in an ordered list, see how is now:

 test/test_transformer.py ⨯✓✓✓✓                                                                                                                                                97% █████████▊
 test/test_utils.py ✓✓                                                                                                                                                         97% █████████▊
 test/test_task_includes.py ✓                                                                                                                                                  95% █████████▋
 test/test_text.py ✓✓                                                                                                                                                          96% █████████▋
 test/test_with_skip_tagid.py ✓✓✓                                                                                                                                              98% █████████▊
 test/test_yaml_utils.py ✓✓✓✓✓                                                                                                                                                 96% █████████▋
 test/test_cli_role_paths.py ✓✓✓✓✓✓✓✓✓✓✓                                                                                                                                       99% █████████▉
 test/test_import_playbook.py ✓                                                                                                                                                97% █████████▊
 test/test_verbosity.py ✓✓✓✓✓✓                                                                                                                                                 98% █████████▉
 test/test_config.py ✓                                                                                                                                                         99% █████████▉
 test/test_constants.py ✓                                                                                                                                                      99% █████████▉
 test/test_dependencies_in_meta.py ✓                                                                                                                                           99% █████████▉
 test/test_errors.py ✓                                                                                                                                                         99% █████████▉
 test/test_examples.py ✓✓✓✓                                                                                                                                                   100% ██████████

File paths are not sorted and even worse, they change between runs. If they would be sorted, it would be much easier to read the output.

Can this be achieved, how?