== sanity test 413k: QoS mkdir exclude prefixes ========== 19:56:04 (1787788564)
lmv.lustre-clilmv-ffff980b875cf800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff980b875cf800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff980b875cf800.qos_exclude_prefixes=_temporary