== sanity test 413k: QoS mkdir exclude prefixes ========== 08:37:57 (1744029477)
lmv.lustre-clilmv-ffff88012e772800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff88012e772800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff88012e772800.qos_exclude_prefixes=_temporary