== sanity test 413k: QoS mkdir exclude prefixes ========== 04:36:15 (1787387775)
lmv.lustre-clilmv-ffff902047c77000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff902047c77000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff902047c77000.qos_exclude_prefixes=_temporary