== sanity test 413k: QoS mkdir exclude prefixes ========== 06:13:02 (1788516782)
lmv.lustre-clilmv-ffff9f2942993000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9f2942993000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9f2942993000.qos_exclude_prefixes=_temporary