Enable Swift's newer feature of container-sync
Enable Swift's newer feature of container-sync

Newer version of container-sync feature is introduced in Swift ver. 1.12.0.

The spec:
http://docs.openstack.org/developer/swift/overview_container_sync.html

Before this commit, Devstack does not configure any realm used in
container-sync, therefore this feature does not work.
To test this feature in CI system, moreover to show the sample
configuration of realms, Devstack now edits realms configuration file.

Change-Id: I9f1e3224403e08e725a989162729470357fe90b0
Closes-Bug: 1378646

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