== sanity test 413k: QoS mkdir exclude prefixes ========== 22:09:34 (1790734174)
lmv.lustre-clilmv-ffff8a3188737800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8a3188737800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8a3188737800.qos_exclude_prefixes=_temporary