sparc portal viewers: remaining issues backlog

[pcrespov]

After deploying https://staging.sparc.science, we configured osparc.io to dispatch the following services per file extension:

We observed some issues and also identified some some improvements. This is a backlog :

• sparc portal UI: rename "viewer" by "service" (@ignapas)
  
• workflow for guest user does not open service in osparc: (@odeimaiz)
  • logout from osparc
  • search some supported file in https://staging.sparc.science (e.g. https://staging.sparc.science/data?type=dataset&q=vtk)
  • select to open with sparc (see screenshot above)
  • should open a different tab and a standalone viewer in osparc
  • the same procedure should work analogously when user in osparc is logged in
• Add p2e test for guest user (@odeimaiz)
• VTK viewer fails (@pcrespov ) : upgraded to 3.0.3 solves the issue.
• RawGraph viewer does not load input CSV file from osparc (@ignapas)
  • find a CSV in sparc portal
  • launch a RawGraph service (logged in in osparc)
  • file is at the input of rawgraph but cannot open in raw-graph

Closes ITISFoundation/osparc-issues#341