Fix to job_output bug

[austin-taylor]

Resolves error where rtmbot crashes due to no job_output

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• I've been mindful about doing atomic commits, adding documentation to my changes, not refactoring too much.
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• I've written tests to cover the new code and functionality included in this PR.
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PR Summary

e.g. New functionality for producing whatsits.

Related Issues

e.g. Fixes #206 and closes #230

Test strategy

e.g. Add tests around whatsit production.

[coveralls]

Coverage decreased (-0.3%) to 28.986% when pulling 1640620 on austin-taylor:patch-1 into d346225 on slackhq:master.

[coveralls]

Coverage decreased (-0.3%) to 28.986% when pulling 1640620 on austin-taylor:patch-1 into d346225 on slackhq:master.

[coveralls]

Coverage decreased (-0.3%) to 28.986% when pulling 1640620 on austin-taylor:patch-1 into d346225 on slackhq:master.

[Roach]

@austin-taylor would you mind signing the updated CLA so I can get this merged? :)

[austin-taylor]

Done