== sanity test 413k: QoS mkdir exclude prefixes ========== 22:13:34 (1746152014)
lmv.lustre-clilmv-ffff880136bc0800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff880136bc0800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff880136bc0800.qos_exclude_prefixes=_temporary