EDIT

rename DescriptiveDataSetServiceTest

first steps for rowwrapper tests

further reduce minFreeHeap for aggregation tests

ref #9801, ref #7980, ref #8871 remove aggregated source descriptions from aggregation and fix persistence issues

cleanup

update Datasource script

ref #7980, ref #8871 improve error handling and verification in aggregations

cleanup, javadoc and minor

ref #7980 fix aggregation for measurement units (still open are not equal units)

adapt dummy measurement unit to meter in test dataset