== sanity test 413k: QoS mkdir exclude prefixes ========== 04:08:34 (1787558914)
lmv.lustre-clilmv-ffff9cdf51fe5800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9cdf51fe5800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9cdf51fe5800.qos_exclude_prefixes=_temporary