Add ability to output MDT xAOD PRD to convertor(s)
This adds a new Muon flag writexAODPRD
(off by default) which when enabled, tells the PRD convertors to also output xAOD PRDs. (By conscious decision, not all functionality of the convertors are supported in this new mode - we want to see if it is really necessary before adding a lot of complex code).
I also added a new test to run the convertors in this mode, and to output the PRDs to ESD.
cc @jojungge
Edited by Edward Moyse