== sanity test 413k: QoS mkdir exclude prefixes ========== 04:19:23 (1780388363)
lmv.lustre-clilmv-ffff9215c5246800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9215c5246800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9215c5246800.qos_exclude_prefixes=_temporary