data/type.yaml.tmpl: Use ceph_osd_devices hiera parameter instead of pup...

...pet default value

hiera('ceph_osd_devices') is never used so the devices list is always puppet default value.

https://github.com/enovance/puppet-openstack-cloud/blob/master/manifests/storage/rbd/osd.pp#L19

Signed-off-by: Dimitri Savineau <dimitri.savineau@enovance.com>