== sanity test 413k: QoS mkdir exclude prefixes ========== 22:10:17 (1786759817)
lmv.lustre-clilmv-ffff954feb68e800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff954feb68e800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff954feb68e800.qos_exclude_prefixes=_temporary