== sanity test 413k: QoS mkdir exclude prefixes ========== 13:00:13 (1777914013)
lmv.lustre-clilmv-ffff8a7c11251800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8a7c11251800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8a7c11251800.qos_exclude_prefixes=_temporary