== sanity test 413k: QoS mkdir exclude prefixes ========== 07:52:58 (1734439978)
lmv.lustre-clilmv-ffff880131c84800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff880131c84800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff880131c84800.qos_exclude_prefixes=_temporary