Use workstage name from XML rather than generic names in logs

[agama]

The workstage name given in the XML should be used in place of the Sn name in the system log and should be added to the associated records generated in any csv files.

Our XML is dynamically generated, based on user defined parameters, which can result in varying numbers of 'pre-test' write steps to configure the object store environment. These results are typically ignored, but without the user defined step names in the system log and the csv files it is difficult to write a generalised programme to extract and report on only the 'real test' data from the run.

[gilmcgrath]

Adding a null comment so I can track as a participant

[ywang19]

new logic for creating stage id will be as following:

if name is set; then
      use the name
else
      use "s" plus stage index
fi

it's expected to be included in upcoming 0.3.3.0 final release

[ywang19]

Just realize one issue with above logic, if people used duplicated stage name, above logic will cause csv file rewrite. so finally, I will keep stage identifier as "s" plus stage index plus stage name, and the identifier will be used in log, stage file (sxxx.csv) and summary file (wxxx.csv).