== sanity test 413k: QoS mkdir exclude prefixes ========== 22:31:29 (1788661889)
lmv.lustre-clilmv-ffff8e73c4af3800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8e73c4af3800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8e73c4af3800.qos_exclude_prefixes=_temporary