fix bug when correct JSON date could not be indexed by fhirbase
fix bug when correct JSON date could not be indexed by fhirbase

Illivion/fhirbase,harikt/fhirbase,dburdick/fhirbase,harikt/fhirbase,Illivion/fhirbase,Illivion/fhirbase,dburdick/fhirbase,harikt/fhirbase