== sanity test 413k: QoS mkdir exclude prefixes ========== 07:50:15 (1734439815)
lmv.lustre-clilmv-ffff88012e16c000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff88012e16c000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff88012e16c000.qos_exclude_prefixes=_temporary