ENYO-2514: work-around xhr abort issue on Mac
ENYO-2514: work-around xhr abort issue on Mac

On Mac, response is called even if the xhr was aborted.

enyojs/ares-project,enyojs/ares-project,enyojs/ares-project,mcanthony/ares-project,mcanthony/ares-project,mcanthony/ares-project,mcanthony/ares-project,mcanthony/ares-project,enyojs/ares-project,enyojs/ares-project,mcanthony/ares-project