== sanity test 413k: QoS mkdir exclude prefixes ========== 19:09:49 (1743462589)
lmv.lustre-clilmv-ffff88008de13800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff88008de13800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff88008de13800.qos_exclude_prefixes=_temporary