Submission ID not in report name

[michaelwisely]

Reports aren't overwritten, but if there is more than one submission for a student, it is impossible to distinguish which report was generated by which submission.

For example, if fmm000 has two submissions (with unique UUIDs), they will each generate reports named fmm000.xx.log. Though they're numbered differently, you can't tell which report was generated by which submission.

TL;DR : This needs to use the submission's... full_id?... instead of user_id.

[michaelwisely]

Even worse: both submissions of a student will assume that the result file with the most recent timestamp was the one it generated.

Gotta remove that bogus code that sorts result files by time stamp.