== sanity test 413k: QoS mkdir exclude prefixes ========== 03:11:14 (1788592274)
lmv.lustre-clilmv-ffff8aae92273800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8aae92273800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8aae92273800.qos_exclude_prefixes=_temporary