Summary:
Instead of doing a cat for all the log files, we first sort them and by exit code and cat the failing tests at the end.
This will make it easier to debug failing tests, since we will just need to look at the end of the logs instead of searching in them
Test Plan: run it locally
Reviewers: sdong, yiwu, lightmark, kradhakrishnan, yhchiang, andrewkr
Reviewed By: andrewkr
Subscribers: andrewkr, dhruba
Differential Revision: https://reviews.facebook.net/D62211
3586901f8f