== sanity test 413k: QoS mkdir exclude prefixes ========== 05:32:02 (1789032722)
lmv.lustre-clilmv-ffff89da1230e800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff89da1230e800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff89da1230e800.qos_exclude_prefixes=_temporary