Improve visibility on the submitted job

[vishalbollu]

Description

Currently a GET call on the Job displays the following fields specified in the job submission:

• config
• workers

Keys such as delimited_files, file_path_lister and item_list are not shown because they could potentially contain a lot of data.

There are potentially two options to help users retrace the entire job submission (not mutually exclusive):

• retrieve the entire job submission in the GET call
• provide the S3 path to the Job submission JSON object in the GET call

There is currently a limit of 10 MB enforced on the size of job submissions.