re-create unique_keys when dataset is loaded from  database (and not newly created).
re-create unique_keys when dataset is loaded from 
database (and not newly created).
openspending/spendb,johnjohndoe/spendb,openspending/spendb,pudo/spendb,nathanhilbert/FPA_Core,johnjohndoe/spendb,nathanhilbert/FPA_Core,spendb/spendb,CivicVision/datahub,spendb/spendb,openspending/spendb,spendb/spendb,USStateDept/FPA_Core,CivicVision/datahub,USStateDept/FPA_Core,nathanhilbert/FPA_Core,pudo/spendb,CivicVision/datahub,pudo/spendb,USStateDept/FPA_Core,johnjohndoe/spendb