Resolve "Nexus writer: beamlines sharing the same tango database and with the same session name"
requested to merge 3808-nexus-writer-beamlines-sharing-the-same-tango-database-and-with-the-same-session-name into master
Closes #3808
Use case: one tango database and different Beacon hosts with each a session with the same name. As a result we have different tango server instances (one per Beacon host) with a writer each with the same session property but different beacon_host properties.
Edited by Wout De Nolf