== sanity test 413k: QoS mkdir exclude prefixes ========== 23:37:03 (1788925023)
lmv.lustre-clilmv-ffff9c4a0857a800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9c4a0857a800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9c4a0857a800.qos_exclude_prefixes=_temporary