== sanity test 413k: QoS mkdir exclude prefixes ========== 12:36:25 (1777566985)
lmv.lustre-clilmv-ffff9f7669d3a800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9f7669d3a800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9f7669d3a800.qos_exclude_prefixes=_temporary