== sanity test 413k: QoS mkdir exclude prefixes ========== 07:24:10 (1789125850)
lmv.lustre-clilmv-ffff8e792094f800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8e792094f800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8e792094f800.qos_exclude_prefixes=_temporary