Remove or fix outdated/incorrect manila hieradata definitions
Remove or fix outdated/incorrect manila hieradata definitions

- manila::backend::cephfsnative::ceph_client_key was initially
  used by tripleo::pacemaker::manila class to define Ceph keyring
  for manila user. During Ocata release this class was adjusted
  to integrate TripleO with ceph-ansible (change:
  I2b5567a39ac8737e80758b705818cc1807dc8bf1) and
  manila::backend::cephfs::ceph_client_key parameter was removed
  from puppet-tripleo.

  For some reason, artifact definition was not removed from THT
  and was renamed to manila::backend::cephfs::ceph_client_key
  (change: Ib408c7827e5fba0c1b01388db26363806fc64370). At this
  point this parameter looks meaningless.

Partial-Bug: #1916386
Change-Id: Id4fa40a046037a90a72ac1ed1a7e77bd5a636e32

openstack/tripleo-heat-templates,openstack/tripleo-heat-templates