== sanity test 413k: QoS mkdir exclude prefixes ========== 04:42:23 (1789461743)
lmv.lustre-clilmv-ffff91f409ab9800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff91f409ab9800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff91f409ab9800.qos_exclude_prefixes=_temporary