XML-RPC server needs logging

[tomkooij]

We could use some logs in : https://github.com/HiSPARC/datastore/blob/master/examples/datastore_config_server.py

(This is just an example, the real on lives in the publicdb/provisioning repo)

[153957]

I agree, I think adding some python logging would be useful.

Maybe even add Sentry (Raven) for better tracking of errors.