== sanity test 413k: QoS mkdir exclude prefixes ========== 01:46:50 (1786945610)
lmv.lustre-clilmv-ffff998b44daf000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff998b44daf000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff998b44daf000.qos_exclude_prefixes=_temporary