moves python2 release to component/jupyter-py2 because it is required by ERP5 but not maintained anymore
moves to python 3 :
- test/test.py
- jupyter_notebook_config.py.jinja
- ERP5kernel.py
modifies custom.js to create a workaround for events issue
upgrades slapos.cookbook version to 1.0.171 to use zero_knowledge recipe with python 3
adds jupyter partition check in software/erp5/test/test_erp5.py