== sanity test 413k: QoS mkdir exclude prefixes ========== 12:02:23 (1786982543)
lmv.lustre-clilmv-ffff9d2945e17800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9d2945e17800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9d2945e17800.qos_exclude_prefixes=_temporary