== sanity test 413k: QoS mkdir exclude prefixes ========== 05:19:08 (1781687948)
lmv.lustre-clilmv-ffff9e306175e800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9e306175e800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9e306175e800.qos_exclude_prefixes=_temporary