When ceph is deployed via TripleO, during the overcloud deployment
phase the tripleo_cephadm role is able to add a new trash purge
scheduler. This change exposes the tripleo CephRbdTrashPurgeInterval
which defines the interval that will be applied to the scheduler.
Depends-On: Ide51ba4cef7c9f0df78d505f7429745285d7d484
Change-Id: I6d560bbd67958ec484248ad0b20ef30f1f9593b8
fcfa8ac23b