made shib discovery service disabled by default on application.rb specific installations can override in environments files DMPRoadmap/roadmap#405
made shib discovery service disabled by default on application.rb specific installations can override in environments files DMPRoadmap/roadmap#405

(cherry picked from commit b359983678b0228781184a1a2a77b6d572dd6635)

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