Ecdc 3494 honour hdf prefix setting
Created by: danesss
Issue
ECDC-3494
Description of work
Force all paths coming from pl72 messages to be used as relative paths appended to hdf-output-prefix setting.
NOTE: This PR requires NICOS to adapt the paths it sends: https://github.com/ess-dmsc/nicos/pull/207
Checklist
-
Changes have been documented in changes.md -
Documentation has been updated in documentationdirectory