== sanity test 413k: QoS mkdir exclude prefixes ========== 20:39:01 (1772761141)
lmv.lustre-clilmv-ffff8fc4584f2800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8fc4584f2800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8fc4584f2800.qos_exclude_prefixes=_temporary