== sanity test 413k: QoS mkdir exclude prefixes ========== 12:17:18 (1788365838)
lmv.lustre-clilmv-ffff95fdf9434800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff95fdf9434800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff95fdf9434800.qos_exclude_prefixes=_temporary