== sanity test 413k: QoS mkdir exclude prefixes ========== 06:40:19 (1787395219)
lmv.lustre-clilmv-ffff984086844800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff984086844800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff984086844800.qos_exclude_prefixes=_temporary