== sanity test 413k: QoS mkdir exclude prefixes ========== 17:22:23 (1786828943)
lmv.lustre-clilmv-ffff8efb792e7800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8efb792e7800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8efb792e7800.qos_exclude_prefixes=_temporary