== sanity test 413k: QoS mkdir exclude prefixes ========== 17:55:10 (1788731710)
lmv.lustre-clilmv-ffff8ee5d26c3800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8ee5d26c3800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8ee5d26c3800.qos_exclude_prefixes=_temporary