== sanity test 413k: QoS mkdir exclude prefixes ========== 12:48:01 (1787849281)
lmv.lustre-clilmv-ffff9ecd9d4f3800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9ecd9d4f3800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9ecd9d4f3800.qos_exclude_prefixes=_temporary