target name for total HH control must be same as control field name

[binnympaul]

The 'target' field in the controls.csv file must be same as the 'control_field' value. The two of these must be same as the value for the token 'total_hh_control' in the settings.YAML file.

If the 'target' field is set to something else, it results in Key Error.

[bettinardi]

For phase 9, a minor error handling flag could be added to report this to the user in a clear way