== sanity test 413k: QoS mkdir exclude prefixes ========== 08:05:31 (1789128331)
lmv.lustre-clilmv-ffff9769080ae800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9769080ae800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9769080ae800.qos_exclude_prefixes=_temporary