== sanity test 413k: QoS mkdir exclude prefixes ========== 12:12:13 (1754410333)
lmv.lustre-clilmv-ffff8f9d10759800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8f9d10759800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8f9d10759800.qos_exclude_prefixes=_temporary