aact-304:  add refresh method to DataDefinition to do wholesale refresh of the table.
aact-304:  add refresh method to DataDefinition to do wholesale refresh of the table.
ctti-clinicaltrials/aact,tibbs001/aact-1,tibbs001/aact-1,tibbs001/aact-1,ctti-clinicaltrials/aact,ctti-clinicaltrials/aact