add unique filter to openstack pool names
add unique filter to openstack pool names

could have scenario where different openstack components would
use the same pool, but the logic would create the same pool
more than once

add unique filter to account for this

travmi/ceph-ansible,bengland2/ceph-ansible,fgal/ceph-ansible,albertomurillo/ceph-ansible,albertomurillo/ceph-ansible,ceph/ceph-ansible,fgal/ceph-ansible,ceph/ceph-ansible,WingkaiHo/ceph-ansible,jtaleric/ceph-ansible,WingkaiHo/ceph-ansible,WingkaiHo/ceph-ansible,bengland2/ceph-ansible,travmi/ceph-ansible,font/ceph-ansible,jtaleric/ceph-ansible,albertomurillo/ceph-ansible,font/ceph-ansible