TST : added test of custom field
TST : added test of custom field

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