== sanity test 413k: QoS mkdir exclude prefixes ========== 10:03:04 (1788616984)
lmv.lustre-clilmv-ffff9e524ae74000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9e524ae74000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9e524ae74000.qos_exclude_prefixes=_temporary