Extend output of job status

[oliver-tarrant-tessella]

As well as returning the status of the job also include:

• Its name
• When created
• When submitted
• When terminated
• Any error message

Acceptance criteria

• Calling the job status handler for a specified job returns the following information:
  • When created
  • Submission attempts
  • When submitted
  • When terminated
  • Any error message
• If information is not available for any category then UNKNOWN is returned
• Trying to get the status of a non existent job returns a 404 not found error

Test Scenarios

• [x] Test that GET job status return all of the above in response.
• [x] Test that a 404 and a user-friendly error message is displayed when a job is not found.