Limit is evaluated too early

[norberttech]

In general, the goal of the limit is to break the pipeline in the early stage after a specific number of rows was reached.
However, the way it works now is a bit naive, since the limit increased just after Rows are extracted from Extractor.
This means, that if later Rows(1) are expanded into Rows(50) during transformation and the limit is set to 5, Loaders will receive Rows(250) in total instead of the expected 5.