Worker status to FAILED instead of stuck in SCORING

[Didayolo]

Description

An old bug of the compute worker is that when the program crashes, the status get stuck to SCORING instead of changing to FAILED, making it confusing for users.

This PR is an attempt at solving this problem.

Issues this PR resolves

• First point of Compute worker issues #1205

A checklist for hand testing

• Check that submissions (results and code) are working fine
• Check that failing submissions get the status FAILED

Warning: it is a compute worker change, re-building the compute worker container is required

Checklist

• Code review by me
• Hand tested by me
• I'm proud of my work
• Code review by reviewer
• Hand tested by reviewer
• CircleCi tests are passing
• Ready to merge

[ObadaS]

Hello @Didayolo
We tried to test this PR but we are having problems making the compute worker crash to simulate the problem.
Do you have any way to replicate the issue so that we can test the fix on our end ?