stdout catching for yadage

[tiborsimko]

In #14 and #15, the standard output of the two steps is being captured in gendata.log and fitdata.log for CWL and Serial workflows.

Let us add the stdout catching for Yadage workflows as well. @lukasheinrich What would be the best paradigm to use? We could use the tee command as for the Serial workflows, but perhaps there exist a more native paradigm like for CWL?

[lukasheinrich]

Does the job controller have a API call to get the stdout after the job has finished?

[diegodelemos]

Yes, there is https://reana-job-controller.readthedocs.io/en/latest/restapi.html#get--jobs-job_id-logs, we will offer this through the rest API in this quarter.