Add sql-expire-samples-only to option list
Add sql-expire-samples-only to option list

Change-Id: I65e9e9657304efa05d34d4771ef67eebb29d8ae4
Closes-Bug: #1510050

ityaptin/ceilometer,idegtiarov/ceilometer,openstack/ceilometer,ityaptin/ceilometer,idegtiarov/ceilometer,openstack/ceilometer