Add: GetJob, DeleteJob, ListJobsByPrefix

[cicoyle]

I would like to add the rest of the CRUD methods, such that a user can use this pkg to:

• AddJob (already exists)
• GetJob (new)
• DeleteJob (new)
• ListJobsByPrefix (new)

Not sure if there was a reason the GetJob, DeleteJob, ListJobsByPrefix weren't already added?

This PR closes this issue

[leo-scalingo]

Hi @cicoyle

Thanks for your contribution.

From what I understand, you're looking to make it more dynamic, our usage so far was to initialize all jobs at the beginning of a sofware.

It's ok to do so, but in this case, entries should by protected by a Mutex to prevent race conditions, can you handle that?

Thanks

[cicoyle]

Closing this PR since our needs went beyond the original intent of this library. We have forked this repo and significantly re-written it for our Distributed Scheduler needs, see here if curious :)