== sanity test 413k: QoS mkdir exclude prefixes ========== 06:30:19 (1777026619)
lmv.lustre-clilmv-ffff952e112fc000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff952e112fc000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff952e112fc000.qos_exclude_prefixes=_temporary