the job: an id, title, describe, owner, run(), and exactly
one of everyMs, everySetting, cron and manualOnly; optionally kind
('cluster' or 'per-process'), scope ('service' or 'realm') and off()
Returns JobSpec
the registered job, with its defaults filled in
Throws
Error (STS-SCHED-0009) when a member is missing or malformed, or
the id is taken
Registers a job. Registering starts nothing.