== sanity test 413k: QoS mkdir exclude prefixes ========== 13:38:02 (1772476682)
lmv.lustre-clilmv-ffff904144bd8800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff904144bd8800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff904144bd8800.qos_exclude_prefixes=_temporary