bugfix: return empty array under the "instuctors" key by default.
bugfix: return empty array under the "instuctors" key by default.

dartajax/ilios,ilios/ilios,justinchu17/ilios,ilios/ilios,justinchu17/ilios,justinchu17/ilios,stopfstedt/ilios,Trott/ilios,Trott/ilios,stopfstedt/ilios,thecoolestguy/ilios,dartajax/ilios,justinchu17/ilios,thecoolestguy/ilios