PIM-1393 : fix has product default sort
PIM-1393 : refactor group type and group data fixtures and update demo
bundle reference
PIM-1393 : fix group type to handle form type changes
PIM-1393 : refactor group type and attribute is removable method
PIM-1393 : remove STA
PIM-1393 : temporary fix for variant group normalizer
PIM-1393 : avoid to use group type code there