== sanity test 413k: QoS mkdir exclude prefixes ========== 22:18:00 (1788920280)
lmv.lustre-clilmv-ffff8b556d363800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8b556d363800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8b556d363800.qos_exclude_prefixes=_temporary