== sanity test 413k: QoS mkdir exclude prefixes ========== 14:49:50 (1789066190)
lmv.lustre-clilmv-ffff9416700a1800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9416700a1800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9416700a1800.qos_exclude_prefixes=_temporary