The HourOfDay aggregate style currently calls the solaragg.find_agg_datum_hod function and requires a dataPath parameter and as such only can aggregate a single datum property. We now have the solaragg.datum_agg_agg aggregate function that can be applied to the entire object, however.

Add new variations of solaragg.find_agg_datum_hod and solaragg.find_agg_datum_seasonal_hod that do not require the dataPath parameter and return entire datum aggregates.