== sanity test 413k: QoS mkdir exclude prefixes ========== 21:18:40 (1787447920)
lmv.lustre-clilmv-ffff9c6e58293800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9c6e58293800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9c6e58293800.qos_exclude_prefixes=_temporary