== sanity test 413k: QoS mkdir exclude prefixes ========== 19:51:17 (1785973877)
lmv.lustre-clilmv-ffff9a66789ab800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9a66789ab800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9a66789ab800.qos_exclude_prefixes=_temporary