Update ceph key url
Update ceph key url

The current key has sporadic timeouts. The commmunity ceph-ansible
recently changed to this url.

blueboxgroup/ursula,ryshah/ursula,persistent-ursula/ursula,zrs233/ursula,knandya/ursula,j2sol/ursula,fancyhe/ursula,pgraziano/ursula,greghaynes/ursula,zrs233/ursula,ryshah/ursula,davidcusatis/ursula,dlundquist/ursula,blueboxgroup/ursula,knandya/ursula,narengan/ursula,wupeiran/ursula,rongzhus/ursula,pgraziano/ursula,fancyhe/ursula,narengan/ursula,rongzhus/ursula,fancyhe/ursula,channus/ursula,pgraziano/ursula,pgraziano/ursula,nirajdp76/ursula,j2sol/ursula,zrs233/ursula,sivakom/ursula,narengan/ursula,fancyhe/ursula,msambol/ursula,j2sol/ursula,rongzhus/ursula,wupeiran/ursula,blueboxgroup/ursula,lihkin213/ursula,narengan/ursula,ddaskal/ursula,knandya/ursula,channus/ursula,edtubillara/ursula,twaldrop/ursula,persistent-ursula/ursula,masteinhauser/ursula,msambol/ursula,edtubillara/ursula,ryshah/ursula,sivakom/ursula,lihkin213/ursula,twaldrop/ursula,kennjason/ursula,masteinhauser/ursula,panxia6679/ursula,nirajdp76/ursula,rongzhus/ursula,davidcusatis/ursula,sivakom/ursula,lihkin213/ursula,channus/ursula,j2sol/ursula,ryshah/ursula,panxia6679/ursula,edtubillara/ursula,kennjason/ursula,lihkin213/ursula,greghaynes/ursula,ddaskal/ursula,davidcusatis/ursula,knandya/ursula,blueboxgroup/ursula,masteinhauser/ursula,panxia6679/ursula,twaldrop/ursula,greghaynes/ursula,persistent-ursula/ursula,dlundquist/ursula,dlundquist/ursula,nirajdp76/ursula,zrs233/ursula,masteinhauser/ursula,twaldrop/ursula,edtubillara/ursula,kennjason/ursula,panxia6679/ursula,msambol/ursula,wupeiran/ursula,persistent-ursula/ursula,ddaskal/ursula,channus/ursula,nirajdp76/ursula,ddaskal/ursula,wupeiran/ursula