== sanity test 413k: QoS mkdir exclude prefixes ========== 10:11:30 (1789135890)
lmv.lustre-clilmv-ffff9b327392d000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9b327392d000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9b327392d000.qos_exclude_prefixes=_temporary