DirectIOART: Change RDO input tests to use AthenaMT
Change RDO input tests to use AthenaMT with threads=1 or MP/MT hybrid since RDOtoRDOTrigger does only support AthenaMT in master.
Change RDO input tests to use AthenaMT with threads=1 or MP/MT hybrid since RDOtoRDOTrigger does only support AthenaMT in master.