== sanity test 413k: QoS mkdir exclude prefixes ========== 21:12:35 (1785460355)
lmv.lustre-clilmv-ffff979d05e01800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff979d05e01800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff979d05e01800.qos_exclude_prefixes=_temporary