== sanity test 413k: QoS mkdir exclude prefixes ========== 18:41:58 (1777588918)
lmv.lustre-clilmv-ffff8dc567568800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8dc567568800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8dc567568800.qos_exclude_prefixes=_temporary