Jupyter notebook as task in an ewoks workflow

https://papermill.readthedocs.io/en/latest/usage-execute.html#execute-via-the-python-api

from papermill import execute_notebook

execute_notebook(
   'path/to/input.ipynb',
   'path/to/output.ipynb',
   parameters=dict(alpha=0.6, ratio=0.1)
)

This supports inputs, execution and saving the notebook with output cells (plots + stdout).

We need to do something for outputs.