Write clouds.yaml to only /etc
Write clouds.yaml to only /etc

After having migrated the copies of clouds.yaml to just consume from
/etc, remove the duplicate copy.

Change-Id: I036704734785958c95d2234917d7b40bd797a375

mssumanth/devstack,openstack-dev/devstack,richliu/devstack,richliu/devstack,samgoon/devstack,avvocatodemarchis/devstack,thomasem/devstack,mssumanth/devstack,openstack-dev/devstack,avvocatodemarchis/devstack,thomasem/devstack,Mahito/devstack,nawawi/openstack,bswartz/devstack,dirkmueller/devstack,group-policy/devstack,prithivm/branch01,group-policy/devstack,bswartz/devstack,noironetworks/devstack,noironetworks/devstack,samgoon/devstack,nawawi/openstack,varunarya10/devstack,varunarya10/devstack,prithivm/branch01,Mahito/devstack,dtroyer/devstack,dtroyer/devstack,bigswitch/devstack,dirkmueller/devstack,bigswitch/devstack