Fix loop dataformat export

This merge request fixes handling of the dataformat objects in the algorithm.

This allows to properly export all dataformats used be it in input, outputs or loop communication.

Tests have been update to ensure that different dataformats are used for these various elements.

added bug confirmed critical labels

changed milestone to %Soft loops

mentioned in merge request beat.core!82 (merged)

merged

mentioned in commit 3e146f57