supervising/supervisor:
supervising/supervisor:

Updated supervisor logging so that the job_id is no longer reported;
instead we report "hazard|risk <calc_id>".

Since the user interacts with 'calculations' in several of the command
line options, it makes sense to log about the calculation, not the job.


Former-commit-id: 35de112d552261ac134c2e63ac313bf2621da3a5
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine