Merge remote-tracking branch 'origin/feature/10131_process_groups'
Refs #10218.  Made change to gsas data format.

On branch feature/10218_gsas_vulcan_format
Changes to be committed:

      modified:   ../Mantid/Framework/PythonInterface/plugins/algorithms/SaveVulcanGSS.py
Merge branch 'feature/10218_gsas_vulcan_format' into develop