== sanity test 413k: QoS mkdir exclude prefixes ========== 10:20:25 (1787840425)
lmv.lustre-clilmv-ffff9049c63fc800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9049c63fc800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9049c63fc800.qos_exclude_prefixes=_temporary