Merge pull request #7347 from tchaikov/wip-hammer-10093

tools: ceph-monstore-tool must do out_store.close()

http://pulpito.ceph.com/sage-2016-01-30_09:58:32-rados-wip-sage-testing-hammer---basic-mira/

Reviewed-by: Sage Weil <sage@redhat.com>