Retrieve all fields for Slurm jobs

[sverhoeven]

As reported at xenon-middleware/xenon-cli#76 a user would like more info on their jobs.

To fetch everything you can use sacct --helpformat to get list of all fields and concat them for get the completed job info and squeue has %all format to report all fields. There will be differences between Slurm version, Slurm deployments, non-completed vs completed jobs, but as the info is in schedulerSpecificInformation that should be OK.