== sanity test 413k: QoS mkdir exclude prefixes ========== 19:23:10 (1787872990)
lmv.lustre-clilmv-ffff9f251f79d000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9f251f79d000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9f251f79d000.qos_exclude_prefixes=_temporary