Added estimated_num_rows to config-size, dataset-size, and I also updated hub_cache to use estimated_num_rows if possible as num_rows (this way no need to modify anything in moon)
TODO
[x] mongodb migration of size jobs
[x] update tests
[x] support mix of partial and exact num_rows in config-size and dataset-size
[x] revert sylvain's suggestion to add "num_rows_source" that is actually not needed
Added estimated_num_rows to config-size, dataset-size, and I also updated
hub_cacheto use estimated_num_rows if possible asnum_rows(this way no need to modify anything in moon)TODO