== sanity test 413k: QoS mkdir exclude prefixes ========== 10:40:25 (1788619225)
lmv.lustre-clilmv-ffff94992a324000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff94992a324000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff94992a324000.qos_exclude_prefixes=_temporary