Merge ns10 NX_class bug fix back to master
Created by: matthew-d-jones
Cherry-picked the fix from https://github.com/ess-dmsc/kafka-to-nexus/pull/538 (release branch) to merge back to master.
Created by: matthew-d-jones
Cherry-picked the fix from https://github.com/ess-dmsc/kafka-to-nexus/pull/538 (release branch) to merge back to master.