== sanity test 413k: QoS mkdir exclude prefixes ========== 02:57:12 (1786949832)
lmv.lustre-clilmv-ffff8af2f25da800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8af2f25da800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8af2f25da800.qos_exclude_prefixes=_temporary