Review serialization of MainPod and MockMainPod after adding the max_depth in the Dict

[ed255]

See #274 (comment)

[robknight]

Is there anything left to do here? Serialization works with the max_depth parameter.

[ed255]

Is there anything left to do here? Serialization works with the max_depth parameter.

Considering that the pod-client is working fine and the json schemas are working well, there's nothing left to do here :)