== sanity test 413k: QoS mkdir exclude prefixes ========== 07:44:03 (1786016643)
lmv.lustre-clilmv-ffffa0d920195000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffffa0d920195000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffffa0d920195000.qos_exclude_prefixes=_temporary