API: require new representation of events
API: require new representation of events

@danielballan

tacaswell/metadataStore,arkilic/metadatastore,hhslepicka/metadatastore,ericdill/databroker,tacaswell/metadataStore,NSLS-II/metadatastore,arkilic/metadatastore,ericdill/databroker,hhslepicka/metadatastore,NSLS-II/metadatastore