Versioning_Toolkit: Upgrader should be calling upgrade methods recursively for sub types

[IsakNaslundBh]

Description:

Currently upgrade of type is limited to be upgraded for the same version for a method upgrade.

For example, having arguments changed in 3.1 and method namespace changed in 3.2 will not work. Upgrade method (and any other upgrader relying on sub parts) should be calling the top level Upgrade when trying to upgrade any of its parameters.

Test file(s):

No available yet, no case yet, but soon coming.