== sanity test 413k: QoS mkdir exclude prefixes ========== 16:17:08 (1780345028)
lmv.lustre-clilmv-ffff99802d422800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff99802d422800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff99802d422800.qos_exclude_prefixes=_temporary