== sanity test 413k: QoS mkdir exclude prefixes ========== 04:01:09 (1789027269)
lmv.lustre-clilmv-ffff93480600a800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff93480600a800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff93480600a800.qos_exclude_prefixes=_temporary