== sanity test 413k: QoS mkdir exclude prefixes ========== 00:06:10 (1789272370)
lmv.lustre-clilmv-ffff90baad080800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff90baad080800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff90baad080800.qos_exclude_prefixes=_temporary