== sanity test 413k: QoS mkdir exclude prefixes ========== 10:57:13 (1783954633)
lmv.lustre-clilmv-ffff89eed2671800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff89eed2671800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff89eed2671800.qos_exclude_prefixes=_temporary