changing implementation of check of attribute variables in fn_etl_check_variables
changing implementation of check of attribute variables in fn_etl_check_variables => in input argument JSON must exist etl_ids for each attribute variable (area domain type, area domain category, sub population type, sub population category) and value of etl_id must not by value zero, the value zero is accepted only for row without distinction and only for type or category that not exists in categorization setup in source db