== sanity test 413k: QoS mkdir exclude prefixes ========== 00:17:18 (1789445838)
lmv.lustre-clilmv-ffff9507c9967800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9507c9967800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9507c9967800.qos_exclude_prefixes=_temporary