== sanity test 413k: QoS mkdir exclude prefixes ========== 22:46:01 (1788921961)
lmv.lustre-clilmv-ffff9b54fa62b800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9b54fa62b800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9b54fa62b800.qos_exclude_prefixes=_temporary