HFS monitoring throws ValueError: Incorrect label count exception

[Guillaume Doré]

Ervery usage or call to one of the monitoring functions in hfs/server.py such as hfs_migrate_remote_user.labels(labels).observe(delta) end up thowing an exception:

ValueError: Incorrect label count

from prometheus_client/core.py

[Rémi Audebert]

See: https://github.com/prometheus/client_python/commit/882d5769da695bee7be5a9806b4b1d4762e23a8a

[Théophile Bastian]

Fixed by 1a21b08