== sanity test 413k: QoS mkdir exclude prefixes ========== 07:04:26 (1773227066)
lmv.lustre-clilmv-ffff9d472f189800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9d472f189800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9d472f189800.qos_exclude_prefixes=_temporary