== sanity test 413k: QoS mkdir exclude prefixes ========== 10:33:32 (1789310012)
lmv.lustre-clilmv-ffff979d6a56b800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff979d6a56b800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff979d6a56b800.qos_exclude_prefixes=_temporary