Issue #215 Fix: report correct job status in _list_job_results when p…

[JohanKJSchreurs]

Issue #215 Fix: report correct job status in _list_job_results when partial=true

This PR corrects the reported job status for some cases in the context of Open-EO/openeo-geopyspark-driver#489, as noted by @bossie, here: #215 (comment) .

• if partial and job error/canceled -> openeo:status running (expected: error/canceled)
• if partial and job finished -> no openeo:status (expected: finished)
• if not partial and job error/canceled -> JobNotFinishedException; after some contemplating I believe this is still OK as the back-end is not required to return intermediate results.

Solution in brief:

Basically we should report the actual job status when partial is true, and also include openeo:status when the job is finished.

• When partial is false and the jobs is not finished, do the same as before: raise JobNotFinishedException.

[bossie]

Added remarks inline.

[bossie]

Looks great.