== sanity test 413k: QoS mkdir exclude prefixes ========== 04:39:05 (1780389545)
lmv.lustre-clilmv-ffff93c1bb2d1800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff93c1bb2d1800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff93c1bb2d1800.qos_exclude_prefixes=_temporary