== sanity test 413k: QoS mkdir exclude prefixes ========== 20:29:30 (1763342970)
lmv.lustre-clilmv-ffff9119d2002800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9119d2002800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9119d2002800.qos_exclude_prefixes=_temporary