== sanity test 413k: QoS mkdir exclude prefixes ========== 17:08:42 (1789592922)
lmv.lustre-clilmv-ffff96c51f712800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff96c51f712800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff96c51f712800.qos_exclude_prefixes=_temporary