Failing/canceled jobs are not properly logged

[eileen-kuehn]

When a job is canceled e.g. due to missing resources it currently happens, that no information is printed to the log. So when inspecting the log it might seem, that a job never did finish.

This should be fixed by

• correcting the logging of exceeded resources, and
• explicit logging when a job fails / is canceled.

When this is fixed, it might help analysing problems as in #39 and #38.