== sanity test 413k: QoS mkdir exclude prefixes ========== 16:37:03 (1789591023)
lmv.lustre-clilmv-ffff999802b31000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff999802b31000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff999802b31000.qos_exclude_prefixes=_temporary