Merge "Make configurable the location where config files are merged"

ansible/group_vars/all.yml

ansible/roles/ceph/tasks/config.yml

ansible/roles/cinder/tasks/config.yml

ansible/roles/glance/tasks/config.yml

ansible/roles/heat/tasks/config.yml

ansible/roles/ironic/tasks/config.yml

ansible/roles/keystone/tasks/config.yml

ansible/roles/magnum/tasks/config.yml

ansible/roles/manila/tasks/config.yml

ansible/roles/mariadb/tasks/config.yml

ansible/roles/mistral/tasks/config.yml

ansible/roles/murano/tasks/config.yml

ansible/roles/neutron/tasks/config-neutron-fake.yml

ansible/roles/neutron/tasks/config.yml

ansible/roles/nova/tasks/config-nova-fake.yml

ansible/roles/nova/tasks/config.yml

ansible/roles/swift/tasks/config.yml