== sanity test 413k: QoS mkdir exclude prefixes ========== 22:20:13 (1788574813)
lmv.lustre-clilmv-ffff9efaa57e6800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9efaa57e6800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9efaa57e6800.qos_exclude_prefixes=_temporary