Issue #97, #98: Aggregate job info per day and per week as part of JobPr...

...ocessing Step in the ETL. Also enable a rest api to fetch this aggregated app info, use check and put to store number of runs, cost and queues,
Is returning the object type Boolean necessary? I think it is just fine to use the primitive type (boolean). Using the object would unnecessarily cause boxing and unboxing and sometimes cause subtle bugs.