== sanity test 413k: QoS mkdir exclude prefixes ========== 11:56:50 (1775836610)
lmv.lustre-clilmv-ffff8db783444800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8db783444800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8db783444800.qos_exclude_prefixes=_temporary