== sanity test 413k: QoS mkdir exclude prefixes ========== 00:23:31 (1788755011)
lmv.lustre-clilmv-ffff9c2742fa9800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9c2742fa9800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9c2742fa9800.qos_exclude_prefixes=_temporary