Test that the real merge algorithm matches the prototype

[jorisdral]

There is currently no established correspondence between the ScheduledMerges prototype and MergeSchedule implementation. Preferably, we should trace enough information in both the prototype and implementation to check that the tree progression matches up.

Some aspects to check would be that the prototype and implementation:

• Have the same tree structure
• Have the same number of total supplied credits per level
• Have the same number of spent credits per level