== sanity test 413k: QoS mkdir exclude prefixes ========== 11:04:43 (1787151883)
lmv.lustre-clilmv-ffff97079865d800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff97079865d800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff97079865d800.qos_exclude_prefixes=_temporary