Pick EDM updates from triggerJsonPayload branch

Event/xAOD/xAODTrigger/CMakeLists.txt

.../xAOD/xAODTrigger/Root/TriggerMenuJsonAuxContainer_v1.cxx

Event/xAOD/xAODTrigger/Root/TriggerMenuJson_v1.cxx

Event/xAOD/xAODTrigger/Root/compileVersionless.cxx

Event/xAOD/xAODTrigger/Root/dict/ContainerProxies.cxx

Event/xAOD/xAODTrigger/Root/xAODTriggerCLIDs.cxx

Event/xAOD/xAODTrigger/xAODTrigger/TriggerMenuJson.h

...AOD/xAODTrigger/xAODTrigger/TriggerMenuJsonAuxContainer.h

...t/xAOD/xAODTrigger/xAODTrigger/TriggerMenuJsonContainer.h

Event/xAOD/xAODTrigger/xAODTrigger/selection.xml

...ger/xAODTrigger/versions/TriggerMenuJsonAuxContainer_v1.h

...rigger/xAODTrigger/versions/TriggerMenuJsonContainer_v1.h

...AOD/xAODTrigger/xAODTrigger/versions/TriggerMenuJson_v1.h

Event/xAOD/xAODTrigger/xAODTrigger/xAODTriggerDict.h

Event/xAOD/xAODTriggerAthenaPool/CMakeLists.txt

...ggerAthenaPool/src/xAODTriggerMenuJsonAuxContainerCnv.cxx

...riggerAthenaPool/src/xAODTriggerMenuJsonAuxContainerCnv.h

Event/xAOD/xAODTriggerCnv/Root/TriggerMenuMetaDataTool.cxx

...D/xAODTriggerCnv/xAODTriggerCnv/TriggerMenuMetaDataTool.h