== sanity test 413k: QoS mkdir exclude prefixes ========== 16:04:15 (1783973055)
lmv.lustre-clilmv-ffff976a0afb1800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff976a0afb1800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff976a0afb1800.qos_exclude_prefixes=_temporary