== sanity test 413k: QoS mkdir exclude prefixes ========== 22:00:41 (1789092041)
lmv.lustre-clilmv-ffff97840b494800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff97840b494800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff97840b494800.qos_exclude_prefixes=_temporary