== sanity test 413k: QoS mkdir exclude prefixes ========== 05:35:15 (1789464915)
lmv.lustre-clilmv-ffff9f45063b6800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9f45063b6800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9f45063b6800.qos_exclude_prefixes=_temporary