Fixes in the NSW TP PRD converters
This MR contains various fixes to the MM and STGC PrepRawData transient<->persistent converters
- make sure that we can store the difference between the PRD Id and the collection Id for MM -> the few cases in which that difference was > 0xffff by shifting 1 bit to the right ( no info is lost )
- fix in the check of the difference size ( now comparing to the proper 16-bits value, not to sizeof that was always 2)
- implement the persistent -> transient conversion that was until now basically not usable
- some fixes in the testing part
Edited by Stefano Rosati