Fix erroring in doc generation

[andrewbaxter439]

What

• changes lines in TaxDonorDataParser.java to avoid syntax conflict
• removes @return comment from public static void constructAggregateTaxDonorPopulationCSVfile()
• sets javadoc building to test on pull request and publish on pull

[andrewbaxter439]

Hi @justin-ven - this seems to have fixed it, just some small edits to commented code in one file. Can you check they make sense? One was an added @return statement where the method returns only void, so makes most sense to remove this? Or was adding in the returned string the intention of this method?

[justin-ven]

Thanks a million Andy,

Justin