== sanity test 413k: QoS mkdir exclude prefixes ========== 06:27:53 (1768562873)
lmv.lustre-clilmv-ffff909e86f38800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff909e86f38800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff909e86f38800.qos_exclude_prefixes=_temporary