== sanity test 413k: QoS mkdir exclude prefixes ========== 05:58:51 (1787824731)
lmv.lustre-clilmv-ffff970cd322f800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff970cd322f800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff970cd322f800.qos_exclude_prefixes=_temporary