== sanity test 413k: QoS mkdir exclude prefixes ========== 01:53:27 (1786946007)
lmv.lustre-clilmv-ffff906d61052000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff906d61052000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff906d61052000.qos_exclude_prefixes=_temporary