added exception for devise managed users.email to use our homegrown email validator
added exception for devise managed users.email to use our homegrown email validator

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