SDC Context builder logs show that it was unable to download the artifact, but doesn't report the error to the context aggregator.

2019-03-11T20:36:46.977Z qtp346224929-4190 ERROR org.onap.pomba.contextbuilder.sdc.service.SpringService RequestId=e46ff362-3ad8-4cca-ad8a-9d6a95c78463, ServiceName=Pomba SDC ContextBuilder, ServiceInstanceId=, StartTime=2019-03-11T20:36:46.664Z, ClientAddress=null, PartnerName=postman, ServerFQDN=pomba-pomba-sdcctxbuilder-6d67bd99bd-rk5fw 500 Internal Server Error, Reason: Failed to retrieve CSAR artifact from SDC: failed to send request to ASDC

SDC context builder should return a dataQuality error in this case.