roles_controller crashes when email is not supplied
roles_controller crashes when email is not supplied

CDLUC3/dmptool,DigitalCurationCentre/roadmap,DMPRoadmap/roadmap,DigitalCurationCentre/roadmap,DMPRoadmap/roadmap,CDLUC3/dmptool,DigitalCurationCentre/roadmap,CDLUC3/dmptool,CDLUC3/dmptool,DMPRoadmap/roadmap