Set configs for glance_store
Set configs for glance_store

glance_store uses a new section to keep its configs. This patch
duplicates the existing, store related, config options and sets them
under the glance_store section.

Once glance is fully migrated, the old options will be removed.

Change-Id: Ie3de87cf07a321415d111e644ccbb360c7491151

richliu/devstack,bigswitch/devstack,promptworks/devstack,dirkmueller/devstack,pombredanne/devstack,group-policy/devstack,rushiagr/devstack,openstack-dev/devstack,prithivm/branch01,neerja28/Devstack_GlusterFS,mssumanth/devstack,prithivm/branch01,affo/devstack,vsham20/devstack,j4/devstack,vsham20/devstack,upadhyay-prashant/devstack,liuquansheng47/devstack,sc68cal/devstack,promptworks/devstack,atulpatil301/devstack,TwinkleChawla/devstack,noironetworks/devstack,vishnugonela/devstack,eshnil2000/devstack,thomasem/devstack,wenhuizhang/devstack,openstack-dev/devstack,liuquansheng47/devstack,dtroyer/devstack,wenhuizhang/devstack,LoHChina/devstack,ozamiatin/devstack,bljgaurav/openstack-test,richliu/devstack,pacinete/devstack,avvocatodemarchis/devstack,CloudServer/devstack,bswartz/devstack,eharney/devstack,bswartz/devstack,nawawi/openstack,ozamiatin/devstack,sequenceiq/devstack,mc2014/devstack,BSJAIN92/OpenStack,neerja28/Devstack_GlusterFS,virtualopensystems/devstack,bq-xiao/devstack,atulpatil301/devstack,LoHChina/devstack,varunarya10/devstack,HPCHub/devstack,eharney/devstack,affo/devstack,herrsechs/devstack,dirkmueller/devstack,mc2014/devstack,Mahito/devstack,thomasem/devstack,tianweizhang/devstack,costingalan/devstack,noironetworks/devstack,kplus/devstack-moonshot,pombredanne/devstack,BSJAIN92/OpenStack,mmasaki/devstack,TwinkleChawla/devstack,sequenceiq/devstack,andrewrothstein/devstack,CloudServer/devstack,tianweizhang/devstack,varunarya10/devstack,flavio-fernandes/devstack,mssumanth/devstack,j4/devstack,pacinete/devstack,samgoon/devstack,NaokiMiyata/devstack,bq-xiao/devstack,nuxeh/devstack,olivierlemasle/devstack,upadhyay-prashant/devstack,nawawi/openstack,bigswitch/devstack,group-policy/devstack,andrewrothstein/devstack,vishnugonela/devstack,kplus/devstack-moonshot,parul24/devstack,bljgaurav/openstack-test,flavio-fernandes/devstack,Mahito/devstack,sc68cal/devstack,HPCHub/devstack,costingalan/devstack,avvocatodemarchis/devstack,dtroyer/devstack,nuxeh/devstack,olivierlemasle/devstack,mmasaki/devstack,pczerkas/devstack,NaokiMiyata/devstack,rushiagr/devstack,parul24/devstack,herrsechs/devstack,pczerkas/devstack,samgoon/devstack