== sanity test 413k: QoS mkdir exclude prefixes ========== 05:04:10 (1733652250)
lmv.lustre-clilmv-ffff8800a9b97800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8800a9b97800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8800a9b97800.qos_exclude_prefixes=_temporary