Postgres: Infer not created results from group.finished_count

[Matthias-Schaub]

MapSwipe 1.0 had a bug. The App did not create results for a group when the user "swipe" all the way throught the group meaning result per task = 0, but increased the group.finished_count.
To make current data in Postgres consistent those results should be created.

• results to be created = group.finished_count - sum({groupId}.results)
• we do not know the user -> Create 3 fake users
  • If the group got finished more then 3 time the way described above, distribute results to the 3 fake users and ignore the rest