work around LRU bug for now
work around LRU bug for now

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