== sanity test 413k: QoS mkdir exclude prefixes ========== 13:01:11 (1790787671)
lmv.lustre-clilmv-ffff8e42440c2800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8e42440c2800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8e42440c2800.qos_exclude_prefixes=_temporary