Disabling (incompatible) collaborative flag and updating python environments

I disabled the collaborative flag also when running from Jupyterhub, which I forgot to disable and was crashing the spawner. This flag was enabled to test the collaborative feature, but it didn't work as expected, because it was limited to the running docker container (so only for 1 user). No real collaboration between different containers.

Took the chance to also update the jupyter and mantid Python environments.