== sanity test 413k: QoS mkdir exclude prefixes ========== 21:17:06 (1768011426)
lmv.lustre-clilmv-ffff934fd04d6800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff934fd04d6800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff934fd04d6800.qos_exclude_prefixes=_temporary