logs of sim4life jobs not appearing in UI logs

[sanderegg]

• start sim4life
• create solver jobs
  --> no logs appear in the osparc logs tab

[sanderegg]

steps taken to reproduce.

local testing:

• start osparc in devel mode
• start a jupyter notebook in osparc
• connect to the local api-server via osparc python library and send jobs, "simulating"
  --> logs are visible in the UI

tested in sim4life.io

• start sim4life.io
• start jupyter inside sim4life.io
• run the same code as above, using the ENVs given to have the node_id in the project_metadata
  --> logs are invisible in the UI! Also the comp_runs table shows that the project metadata are not sent to the computational backend

tested in AWS-master

• same procedure as in sim4life.io
  --> logs are visible in the UI! seems to be fixed.
  to be confirmed by @mguidon

[sanderegg]

s4l is starting the job prior to setting the project metadata, therefore no logs are streamed back.
changing that lead to some issues as director-v2 complains when the node_id in the metadata is unknown. This is fixed by #5432