replaced DS promise with RSVP promise in totalSumOfferingsDuration.
replaced DS promise with RSVP promise in totalSumOfferingsDuration.

gabycampagna/frontend,jrjohnson/frontend,thecoolestguy/frontend,ilios/frontend,djvoa12/frontend,thecoolestguy/frontend,dartajax/frontend,gboushey/frontend,gboushey/frontend,jrjohnson/frontend,dartajax/frontend,gabycampagna/frontend,djvoa12/frontend,ilios/frontend