== sanity test 413k: QoS mkdir exclude prefixes ========== 06:13:13 (1780999993)
lmv.lustre-clilmv-ffff947f20939800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff947f20939800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff947f20939800.qos_exclude_prefixes=_temporary